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Why Oumuamua May Have Been The First Sign of Intelligent Life with Dr. Avi Loeb

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  • Avi Loeb - Extraterrestrial:The First Sign of Intelligent Life Beyond Earth

    3:22

    Abraham (Avi) Loeb is the Frank B. Baird, Jr., Professor of Science at Harvard University. He received a PhD in Physics from the Hebrew University of Jerusalem in Israel at age 24 (1980-1986), led the first international project supported by the Strategic Defense Initiative (1983-1988), and was subsequently a long-term member of the Institute for Advanced Study at Princeton (1988-1993). Loeb has written 8 books, including most recently, Extraterrestrial (Houghton Mifflin Harcourt, 2021), and about 800 papers (with an h-index of 112) on a wide range of topics, including black holes, the first stars, the search for extraterrestrial life and the future of the Universe. He had been the longest serving Chair of Harvard's Department of Astronomy (2011-2020), Founding Director of Harvard's Black Hole Initiative (2016-present) and Director of the Institute for Theory and Computation (2007-present) within the Harvard-Smithsonian Center for Astrophysics . He serves as Chair of the Board on Physics and Astronomy of the National Academies (2018-present) and is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, and the International Academy of Astronautics. Loeb is a former member of the President's Council of Advisors on Science and Technology (PCAST) at the White House and a member of the Advisory Board for Einstein: Visualize the Impossible of the Hebrew University. He also chairs the Advisory Committee for the Breakthrough Starshot Initiative (2016-present) and serves as the Science Theory Director for all Initiatives of the Breakthrough Prize Foundation. In 2012, TIME magazine selected Loeb as one of the 25 most influential people in space and in 2020 Loeb was selected among the 14 most inspiring Israelis of the last decade. Click here for Loeb's commentaries on innovation and diversity

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  • Was Earth visited by intelligent life? Astrophysicist Avi Loeb believes it was

    22:07

    Avi Loeb is a theoretical physicist in the fields of astrophysics and cosmology. He is also the author of the best-selling book, “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth. In this episode, Loeb explains why the interstellar object known as Oumuamua could be evidence of alien technology.


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  • Avi Loeb: Is ‘Oumuamua extraterrestrial technology? Lets be open-minded in the search for aliens.

    12:17

    Harvard astrophysicist Avi Loeb has drawn criticism for suggesting ‘Oumuamua, a weird object passing through the solar system could be an alien spacecraft. But he insists we must keep an open mind when nature throws us a curveball like this, and that the search for extraterrestrial life is just good science.

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  • Avi Loeb: The First Interstellar Visitor to Earth

    59:19

    In late 2017, scientists at a Hawaiian observatory glimpsed an object soaring through our inner solar system, moving so quickly that it could only have come from another star. That begs the question: what exactly was that object?

    Harvard’s top astronomer Avi Loeb joins us via livestream to share his theory: that the object was the first confirmed interstellar visitor to be spotted in our solar system. With insight from his book Extraterrestrial: The First Sign of Intelligent Life Beyond Earth, he explains all of the reasons the object couldn’t have been an asteroid, and why he believes it was a piece of advance technology created by a distant alien civilization. He further outlines his controversial theory, and explores the implications: for science, for religion, and for the future of our species and our planet. Join us as we aim for the stars with this thrilling discussion, where Loeb asks us to think big and to expect the unexpected.

    Abraham (Avi) Loeb is the Frank B. Baird, Jr., Professor of Science at Harvard University, chair of Harvard's Department of Astronomy, founding director of Harvard's Black Hole Initiative, and director of the Institute for Theory and Computation (ITC) within the Harvard-Smithsonian Center for Astrophysics. He also chairs the Advisory Committee for the Breakthrough Starshot Initiative, serves as the science theory director for all Initiatives of the Breakthrough Prize Foundation, as well as chair of the Board on Physics and Astronomy of the National Academies. Author of four books and over 700 scientific papers, Loeb is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, and the International Academy of Astronautics.

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  • Extraterrestrial Life - Avi Loeb

    1:31:00

    A Reno Family Foundation Symposium
    Extraterrestrial Life with Avi Loeb, PhD
    Monday October 16th, 2019
    Museum of Science, Boston

    Are we the Universe’s only children and our thoughts its only thoughts? Given that a quarter of all stars host a habitable Earth-size planet, it would be arrogant to think we are. Upcoming searches will look for intelligent life on planets outside the Solar System through industrial pollution in their planetary atmospheres and space archaeology of debris from dead civilizations. Our own civilization is exploring interstellar travel. If successful, we might receive a signal from outer space stating: “welcome to the interstellar club!” Or we may receive a “message in a bottle,” implying that we should examine carefully any unusual object that arrives from outside the Solar System, such as `Oumuamua. Join superstar astronomer Avi Loeb to consider extraterrestrial life and how ‘Oumuamua might be a probe sent by an alien civilization.

    Join superstar astronomer Avi Loeb to consider extraterrestrial life and how ‘Oumuamua might be a probe sent by an alien civilization.

    Funding provided by the Reno Family Foundation Fund. This program is free thanks to the generosity of the Lowell Institute.

  • Extraterrestrial—The First Sign of Intelligent Life Beyond Earth by Avi Loeb

    5:00

    This is a preview of the digital audiobook of Extraterrestrial—The First Sign of Intelligent Life Beyond Earth by Avi Loeb, available on Libro.fm at

    Libro.fm is the first audiobook company to directly support independent bookstores. Libro.fm's bookstore partners come in all shapes and sizes but do have one thing in common: being fiercely independent. Your purchases will directly support your chosen bookstore.


    Extraterrestrial
    The First Sign of Intelligent Life Beyond Earth
    By: Avi Loeb
    Narrated by: Robert Petkoff
    Length: 7 hours 7 minutes
    Description

    “Provocative and thrilling ... Loeb asks us to think big and to expect the unexpected.”—Alan Lightman, New York Times bestselling author of Einstein’s Dreams and Searching for Stars on an Island in Maine

    Harvard’s top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star. In late 2017, scientists at a Hawaiian observatory glimpsed an object soaring through our inner solar system, moving so quickly that it could only have come from another star. Avi Loeb, Harvard’s top astronomer, showed it was not an asteroid; it was moving too fast along a strange orbit, and left no trail of gas or debris in its wake. There was only one conceivable explanation: the object was a piece of advanced technology created by a distant alien civilization. In Extraterrestrial, Loeb takes readers inside the thrilling story of the first interstellar visitor to be spotted in our solar system. He outlines his controversial theory and its profound implications: for science, for religion, and for the future of our species and our planet. A mind-bending journey through the furthest reaches of science, space-time, and the human imagination, Extraterrestrial challenges readers to aim for the stars—and to think critically about what’s out there, no matter how strange it seems.

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  • Avi Loeb, Harvard Professor- Author:Extraterrestrial.The First Sign of Intelligent Life Beyond Earth

    34:05

    Episode 91! ARE WE ALONE?
    Avi Loeb, Harvard Professor | Author: Extraterrestrial. The First Sign of Intelligent Life Beyond Earth

    Avi Loeb, chair of Harvard’s Department of Astronomy, believes that an alien visited in 2017 — and more are coming.

    In his upcoming book, “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth” (Houghton Mifflin Harcourt), out Jan. 26, the professor lays out a compelling case for why an object that recently wandered into our solar system was not just another rock but actually a piece of alien technology.

    The object in question traveled toward our solar system from the direction of Vega, a nearby star 25 light-years away, and intercepted our solar system’s orbital plane on Sept. 6, 2017.

    On Sept. 9, its trajectory brought it closest to the sun. At the end of September, it blasted at about 58,900 miles per hour past Venus’ orbital distance, and then, on Oct. 7, it shot past Earth’s before “moving swiftly toward the constellation Pegasus and the blackness beyond,” Loeb writes in the book.

    The object was first spotted by an observatory in Hawaii containing the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) — the highest-definition telescope on Earth.

    The space object was dubbed ‘Oumuamua (pronounced “oh moo ah moo ah”), which is Hawaiian for — roughly — “scout.”

    As space travelers go, it was relatively small at just about 100 yards long, but it was a big deal in the scientific community.

    ARE WE ALONE IN THE UNIVERSE? ....

    #aviloeb #extraterrestrial #outterspace #iwanttobelieve #Harvard #astronomy #newbook #author #TMWS #TheMillennialWayShow

  • Avi Loeb: National Book Festival 2021

    31:21

    Avi Loeb discusses Extraterrestrial: The First Sign of Intelligent Life Beyond Earth (Houghton Mifflin Harcourt) with science journalist Sarah Scoles.

    For transcript and more information, visit

  • Avi Loeb, Professor and Author

    18:10

    In this episode of Talks at GS, Avi Loeb, Harvard professor and author of Extraterrestrial: The First Sign of Intelligent Life Beyond Earth, discusses his theory that our solar system was recently visited by advanced alien technology from a distant star, issues impacting space exploration and discovery, as well as the state of scientific research today. Learn More

    Chapters:
    1. DISCOVERING ‘OUMUAMUA 0:59
    2. EVIDENCE IN SCIENTIFIC INQUIRY 5:49
    3. ‘OUMUAMUA’S POSSIBLE FUNCTION 10:01
    4. THE PENTAGON UAP REPORT 12:00
    5. THE BREAKTHROUGH STARSHOT INITIATIVE 15:51

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  • Abraham Loeb: New Search Methods for Primitive and Intelligent Life Far from Earth

    1:28:30

    Are we alone or is the universe teeming with life? is one of the most fundamental questions in science. The answer could have a dramatic impact on society and culture. Over the next decade, advances in technology will allow astronomers to address this question in new ways. Abraham (Avi) Loeb will describe a few novel techniques that could potentially detect primitive or intelligent forms of life in the solar system and around nearby stars. He will then discuss how early after the Big Bang life may have started, as well as its prospects for survival in our long-term cosmic future.

  • The story of Oumuamua, the first visitor from another star system | Karen J. Meech

    13:25

    In October 2017, astrobiologist Karen J. Meech got the call every astronomer waits for: NASA had spotted the very first visitor from another star system. The interstellar comet -- a half-mile-long object eventually named `Oumuamua, from the Hawaiian for scout or messenger -- raised intriguing questions: Was it a chunk of rocky debris from a new star system, shredded material from a supernova explosion, evidence of alien technology or something else altogether? In this riveting talk, Meech tells the story of how her team raced against the clock to find answers about this unexpected gift from afar.

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  • Author Avi Loeb on evidence of close extraterrestrial encounters, new book

    7:54

    Professor Avi Loeb is a respected astrophysicist, former chair of Harvard's Astronomy Department, and a published author. In his new book, Loeb writes that we may have had a brush with an alien civilization a couple of years ago. Michelle Miller has the details.

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  • Did aliens visit us in 2017? Dr. Avi Loeb, Astrophysicist at Harvard University | Sotoventures | E01

    35:18

    In this first episode of the Science, Space, & Spirituality podcast, I interview Dr. Avi Loeb who is a globally recognized scientist & astrophysicist who currently teaches at Harvard University.

    Dr. Avi Loeb & I discuss the object scientists call Oumuamua, which passed by Earth in 2017 but wasn't a comet and looks more like alien technology.

    He is pretty convinced that ʻOumuamua was artificial and probably alien technology of some kind.

    He's got a book coming out within days titled Extraterrestrial: The First Sign of Intelligent Life Beyond Earth.

    Dr. Loeb's also been featured on The Joe Rogan Experience podcast, New York Magazine,TMZ, Business Insider, and many others.

    Check out his website to learn more:

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  • Avi Loeb | Oumuamua, Astrophysics, and Academias struggle with new ideas | People of Science

    1:12:50

    On this episode of People of Science we are pleased to have Avi Loeb on to discuss the scientific mystery of Oumuamua. Avi is an Astrophysicist who's hypothesis on the first detected interstellar object to pass through our solar system looks at all the facts and leads us to challenge humanities greatest question - Are we alone in the universe?

    A true Sherlock Holmes style mystery challenging our logic when the evidence in front of us points to Oumuamua not having a natural origin. First thought to be a comet, but without any evidence of a tail or gas emitting from it as it passed the sun the change in orbit can't be accounted for. Add up the other details; a large change in reflectivity pointing to a pancake shape (not cigar shaped) and knowledge that we've discovered our own space trash exhibiting the same behavior from the sun's reflectivity - it points to Oumuamua exhibiting a very long and wide shape measuring 1mm or thinner in thickness that was 'pushed' by the Sun as it went by.

    Where did this object come from? Is it spacecraft remnants from another civilization? Are there more of them out there?

    Avi kindly breaks down the entire mystery and the resistance this idea is having in the Academic circles. We welcome this thoughtful hypothesis that has the chance to change the entire way we think about life on Earth and is testable in under 10 years. Please enjoy the podcast

    Purchase Avi's book Extraterrestrial: The First Sign of Intelligent Life Beyond Earth:
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  • Mindscape 131 | Avi Loeb on Taking Aliens Seriously

    1:40:35

    Patreon:

    The possible existence of technologically advanced extraterrestrial civilizations — not just alien microbes, but cultures as advanced (or much more) than our own — is one of the most provocative questions in modern science. So provocative that it’s difficult to talk about the idea in a rational, dispassionate way; there are those who loudly insist that the probability of advanced alien cultures existing is essentially one, even without direct evidence, and others are so exhausted by overblown claims in popular media that they want to squelch any such talk. Astronomer Avi Loeb thinks we should be taking this possibility seriously, so much so that he suggested that the recent interstellar interloper `Oumuamua might be a spaceship built by aliens. That got him in a lot of trouble. We talk about the trouble, about `Oumuamua, and the attitude scientists should take toward provocative ideas.

    Abraham (Avi) Loeb received his Ph.D. in plasma physics from the Hebrew University of Jerusalem. He is currently the Frank B. Baird Jr. professor of science at Harvard University. He served as the Chair of Harvard’s Astronomy department from 2011-2020. He is Director of the Institute for Theory and Computation of the Harvard-Smithsonian Center for Astrophysics, and Founding Director of Harvard’s Black Hole Initiative. He is chair of the Advisory Committee for the Breakthrough Starshot Initiative. His new book is Extraterrestrial: The First Sign of Intelligent Life Beyond Earth.

    Blog post with audio player, show notes, and transcript:

    Mindscape Podcast playlist:

    #podcast #ideas #science #philosophy #culture

  • Abraham Avi Loeb - Alien Intelligences

    10:21

    Whether there are other intelligences in the vast cosmos is one of the big questions of human existence and perhaps of existence in general. Estimates using probabilities almost always portray a universe teeming with sentient creatures. Any implication of human uniqueness seems to contradict basic assumptions of science. And yet, there is no sign of alien intelligences, none whatsoever. Why?

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    Avi Loeb is a theoretical physicist who works on astrophysics and cosmology and the Frank B. Baird, Jr. Professor of Science at Harvard University. He is the author of Extraterrestrial: The First Sign of Intelligent Life Beyond Earth.

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  • The Case for Cosmic Modesty | Abraham Loeb | TEDxHarvardCollege

    17:49

    Based on the premise that we are not special, Loeb argues for modesty from a cosmic perspective. His “principle of cosmic modesty” implies that both primitive and intelligent forms of life should exist away from Earth, and we should therefore search for them without prejudice.
    Abraham (Avi) Loeb is the Frank B. Baird Jr. Professor of Science at Harvard University. He published nearly 600 papers and 4 books which pioneered several new frontiers in astrophysics and cosmology. Loeb serves as Chair of the Department of Astronomy, Founding Director of Harvard's Black Hole Initiative and Director of the Institute for Theory and Computation (ITC) . He also chairs the Advisory Committee for the Breakthrough Starshot Initiative, serves as the Science Theory Director for all Initiatives of the Breakthrough Prize Foundation, and holds the Sackler Senior Professorship by Special Appointment at Tel Aviv University. He is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, and the International Academy of Astronautics, as well as Vice Chair of the Board on Physics and Astronomy of the National Academies. Within Harvard, Loeb serves on the President's Task Force on Diversity and Belonging , the FAS Dean's Faculty Resources Committee, and the Provost's Allston Academic Planning Committee. In 2012, TIME magazine selected Loeb as one of the 25 most influential people in space. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at

  • Could Cosmic Interloper Be An Alien Spacecraft? Neil DeGrasse Tyson Isn’t Sure | Mach | NBC News

    4:09

    Scientists have been puzzling over a mysterious object in space ever since it was first spotted tumbling past the sun in late 2017. Now a pair of Harvard researchers are raising the possibility that it’s an alien spacecraft. As they say in a paper to be published Nov. 12 in The Astrophysical Journal Letters, the object may be a fully operational probe sent intentionally to Earth vicinity by an alien civilization.
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    Could Cosmic Interloper Be An Alien Spacecraft? Neil DeGrasse Tyson Isn’t Sure | Mach | NBC News

  • Avi Loeb: Extraterrestrial Life - From Bio-Signatures to Techno-Signatures – Rosseland lecture 2019

    1:21:48

    Are we alone? Probably not, out of modesty – keeping in mind that about a quarter of all stars host a habitable Earth-size planet.

    Last year, the first interstellar object, `Oumuamua, was discovered in the Solar System. In this talk, Avi Loeb describes its unusual properties and the possibility that it carries a technological message in a bottle.

    Professor Avi Loeb is Chair of the Astronomy Department, Director of the Institute for Theory and Computation and Founding Director of the Black Hole Initiative, Harvard University.

    The Rosseland Lecture is held annually by the Institute of Theoretical Astrophysics, University of Oslo, in memory of Norway’s foremost astrophysicist, and founder of our institute, Professor Svein Rosseland (1894 – 1985).

  • Avi Loeb: Extraterrestrial Life: Are We the Sharpest Cookies in the Jar?

    2:7:48

    Dr. Loeb is an Israeli-American theoretical physicist, with broad interests in the fields of astrophysics and cosmology. He has worked on the formation and evolution of black holes, the first generation of stars in the universe and the epoch of reionization, as well as high-redshift gamma-ray bursts. The proposed direct measurement method of the acceleration/deceleration of the universe by using the Lyman-alpha forest carries his name, the “Sandage-Loeb test”. He is worldwide known for a large number of studies and predictions - often pioneering and provocative, including the intuition that exoplanets could be detected via gravitational microlensing and that interstellar meteors could impact Earth - and for his commitment in the search for extraterrestrial life. He also coined the concept of the habitable epoch of the early universe. In the past few years his name has been linked to ‘Oumuamua, the first known interstellar object passing through the Solar System, as he conjectured about its possible artificial, extraterrestrial origin. Dr. Loeb is chairing various advisory committees, and is the science theory director for the Breakthrough Initiatives.

    [07:40] - beginning of the presentation
    [1:21:00] - beginning of the Q&A

    Spanish version:

    The panel of our 'Golden Webinar' consisted of:
    • Avi Loeb – speaker
    • Patricio Gonzalez (patricio.gonzalez.interprete@gmail.com) – Interpreter
    • Thomas H. Puzia – co-host, faculty at IA
    • Demetra De Cicco – co-host, postdoctoral fellow at IA
    • Felipe Barrientos – Director of the Institute of Astrophysics (IA)
    • Elizabeth Artur de la Villarmois – postdoc at IA
    • Paula Ronco – postdoc at IA
    • Giuseppe D'Ago – postdoc at IA
    • Sara Seager – Class of 1941 Professor of Planetary Science, Physics, and Aerospace Engineering at the Massachusetts Institute of Technology
    • Jill Tarter – Chair Emeritus for SETI Research at the SETI Institute
    • John Blakeslee – Director for Science at Gemini Observatory
    • Paul Hoyningen-Huene – Professor of Philosophy in Institute of Philosophy at the Leibniz University Hannover, Germany, and Lecturer at the Department of Economics at Universität Zürich
    • Steven Beckwith – Professor of Astronomy and Director of the Space Sciences Laboratory at the University of California, Berkeley
    • Dietrich Baade – Astronomer at the European Southern Observatory in Garching
    • Ricardo Acevedo – Q&A manager, outreach team IA

    The 'Golden Webinars in Astrophysics' series seeks to bring forefront research in astronomy, astrophysics, and cosmology to the public in the English and Spanish language. Full schedule of the Golden Webinars series:

    #goldenwebinars #IAPUC #AstroUC #extraterrestrial #oumuamua #SETI #science #astronomy

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    Avi Loeb's book:
    'Extraterrestrial: The First Sign of Intelligent Life Beyond Earth':

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  • The Search for Primitive and Intelligent Life on Other Planets

    1:22:58

    Professor Abraham (Avi) Loeb, chair of the Astronomy department, Harvard University.
    Are we alone? Probably not, out of modesty - keeping in mind that about a quarter of all stars host a habitable Earth-size planet. Upcoming searches for primitive life will aim to detect oxygen or methane in the atmospheres of transiting planets. Searches for intelligent life will aim to detect artificial signals in the radio or optical bands, as well as artifacts such as megastructures, solar cells that are used to re-distribute light and heat on tidally-locked planets, industrial pollution or artificial light beams. Our own civilization is starting to study the feasibility of interstellar travel using a powerful laser beam pushing on a lightweight sail, the so-called Starshot Initiative. If successful, we might receive a signal from outer space stating: welcome to the interstellar club!.

  • Seriously Entertaining: Avi Loeb on From This Moment On

    10:55

    AVI LOEB, founding director of Harvard’s Black Hole Initiative and author of Extraterrestrial: The First Sign of Intelligent Life Beyond Earth (2021), reminds us all that as humans we occupy only a tiny portion of the universe and should remain curious about the many worlds and lifeforms we have yet to discover. From House of Speakeasy's Seriously Entertaining, March 2021.

  • Comes A Time: Avi Loeb

    1:45

    Oteil & Mike welcome Avi Loeb, Harvard Professor of Science and Chair of the Department of Astronomy. On today’s episode, Avi explains his theory that our solar system was recently visited by advanced alien technology from a distant star, his philosophy around science, and his views on how the academic and scientific community should approach important but taboo topics.

    You can learn more about Avi on his website here: and pre-order his new book - Extraterrestrial: The First Sign of Intelligent Life Beyond Earth - here:

    Abraham (Avi) Loeb is the Frank B. Baird, Jr., Professor of Science at Harvard University. He received a PhD in Physics from the Hebrew University of Jerusalem in Israel at age 24 (1980-1986), led the first international project supported by the Strategic Defense Initiative (1983-1988), and was subsequently a long-term member of the Institute for Advanced Study at Princeton (1988-1993). Loeb wrote 8 books and over 750 papers on a wide range of topics, including black holes, the first stars, the search for extraterrestrial life and the future of the Universe. He had been the longest serving Chair of Harvard's Department of Astronomy (2011-2020), Founding Director of Harvard's Black Hole Initiative (2016-present) and Director of the Institute for Theory and Computation (2007-present) within the Harvard-Smithsonian Center for Astrophysics . He serves as Chair of the Board on Physics and Astronomy of the National Academies (2018-present) and is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, and the International Academy of Astronautics. Loeb is a member of the President's Council of Advisors on Science and Technology (PCAST) at the White House and a member of the Advisory Board for Einstein: Visualize the Impossible of the Hebrew University. He also chairs the Advisory Committee for the Breakthrough Starshot Initiative (2016-present) and serves as the Science Theory Director for all Initiatives of the Breakthrough Prize Foundation. In 2012, TIME magazine selected Loeb as one of the 25 most influential people in space. Click here for Loeb's commentaries on innovation and diversity.

    This podcast is available on Apple Podcasts, Spotify, or wherever you get your podcasts. Please leave us a rating or review on iTunes!

    Comes A Time is brought to you by Osiris Media. Hosted and Produced by Oteil Burbridge and Mike Finoia. Executive Producers are Christina Collins, RJ Bee and Kirsten Cluthe. Production, Editing and Mixing by Eric Limarenko and Matt Dwyer. Theme music by Oteil Burbridge. To discover more podcasts that connect you more deeply to the music you love, check out osirispod.com
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  • Interview: Oumuamua, Aliens and Astrophysics with Dr. Avi Loeb

    1:26

    Professor Avi Loeb is a theoretical physicist from Harvard who has worked on many advances in space and astrophysics. He helped predict exoplanet discoveries using microlensing, worked on the mathematics for the Event Horizon Telescope, and has many fascinating opinions about the search for extraterrestrials.



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  • The Search for Primitive and Intelligent Life on Other Planets

    1:25:13

    Prof. Abraham (Avi) Loeb, Chair of the Astronomy Department, Harvard University

    Are we alone? Probably not, out of modesty - keeping in mind that about a quarter of all stars host a habitable Earth-size planet. Upcoming searches for primitive life will aim to detect oxygen or methane in the atmospheres of transiting planets. Searches for intelligent life will aim to detect artificial signals in the radio or optical bands, as well as artifacts such as megastructures, solar cells that are used to re-distribute light and heat on tidally-locked planets, industrial pollution or artificial light beams. Our own civilization is starting to study the feasibility of interstellar travel using a powerful laser beam pushing on a lightweight sail, the so-called Starshot Initiative. If successful, we might receive a signal from outer space stating: Welcome to the interstellar club!

    Original music by Mark C. Petersen, Loch Ness Productions. Used with permission.

    Animations used under Creative Commons Attribution 4.0 International License. Photo credit: ESO/M. Kornmesser

  • Avi Loeb: Aliens, Black Holes, and the Mystery of the Oumuamua | Lex Fridman Podcast #154

    2:43:51

    Avi Loeb is an astrophysicist at Harvard. Please support this podcast by checking out our sponsors:
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    OUTLINE:
    0:00 - Introduction
    2:31 - Are we alone in the universe?
    6:46 - Consciousness
    11:23 - Sending digital copies of humans to space
    16:01 - Oumuamua
    38:04 - Alien space junk
    42:03 - What do aliens look like?
    59:21 - Drake equation
    1:00:23 - Industrial polution from aliens
    1:12:15 - UFO sightings
    1:20:11 - How long will human civilization last?
    1:22:51 - Radio signal from Proxima Centauri
    1:26:12 - Breakthrough Starshot project
    1:29:11 - Space race
    1:34:22 - Human space exploration
    1:39:38 - Social media is a threat to society
    1:44:26 - Are humans ready for discovering an alien civilization?
    1:48:38 - Mayans used astrology to wage war
    1:49:53 - Black holes
    2:08:43 - Stephen Hawking
    2:12:21 - Grigori Perelman
    2:16:46 - Theory of everything
    2:23:45 - Dark matter
    2:26:28 - Advice for young people
    2:29:32 - Memories of my father and mother
    2:34:01 - Existentialism
    2:36:15 - Mortality
    2:38:49 - Meaning of life

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  • Scientist Thinks Mysterious Interstellar Object is Extraterrestrial

    11:47

    This clip is taken from the Joe Rogan Experience #1596 with Avi Loeb.

  • The search for extraterrestrial life - Avi Loeb

    13:18

    Source -

    Harvard Prof. Avi Loeb on biomarkers in our Galaxy, bubble of radio wave around the Earth, and the earliest possible life

  • Dr. Ray Weymann - The Mystery of ‘Oumuamua: Our First Interstellar Visitor

    59:29

    Dr. Ray Weymann shares current methods and equipment used to discover objects in our solar system and recounts the discovery of ‘Oumuamua.

  • ‘Oumuamua – Our Solar System’s First Known Interstellar Visitor

    1:13:45

    Dr. Michael E. Summers speaks to the Northern Virginia Astronomy Club in June of 2021. The discovery of ‘Oumuamua (1I/2019/U1) represented our first detection of a solar system object with an origin that was definitely outside of our solar system. Its name comes from Hawaiian meaning “first messenger from afar” yet deciphering its message has proved difficult and controversial. ‘Oumuamua was discovered by the Pan-STARRS telescope at the Haleakala Observatory in Hawaii on October 19, 2017, when it had already made its closest approach to the Earth on a hyperbolic orbit that would carry it back into the interstellar medium from which it came. Although currently classified as an interstellar comet, it has characteristics completely unlike any known comet. Its unusual shape, lack of a coma, and the fact that it exhibited non-gravitational acceleration has made its classification a complex problem. This talk will cover what is known about ‘Oumuamua and various proposals for its origin, including the suggestion that it is a product of alien technology.

  • Does intelligent life exist beyond Earth? | The Stream

    25:26

    Astronomer Avi Loeb argues that a 2017 sighting of an interstellar space object, which scientists named ‘Oumuamua, was evidence of advanced alien technology.

    His controversial hypothesis generated curiosity and excitement while also putting him at odds with astronomers who believe in a more natural explanation for the ‘Oumuamua phenomenon. Perhaps ‘Oumuamua was an abnormal asteroid or comet, some say. But Loeb, a Harvard professor and a former chair of its astronomy department, believes the oblong space object was an alien lightsail, propelled through our solar system by energy from a sun or star.

    In this episode of The Stream, we’ll speak to Avi Loeb about his latest book, “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth” and ask why he believes we are not alone in the universe.


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  • How Oumuamua Changed The Way We Watch Space

    15:59

    Space missions usually take years to prepare. Now the European Space Agency is designing one that can spring into action when an interstellar object appears, allowing a close-up look before it passes us by.

    #Space #Moonshot #Science

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  • Avi Loeb: Breakthrough Discuss 2017

    14:30

    Title: Session Three: Scientific Goals and Instrumentation for a Flyby Visit to the Nearest Stars

    The Breakthrough Discuss 2017 conference was held April 20-21, 2017 at Stanford University. The conference was hosted by Stanford University's Department of Physics and the Harvard Smithsonian Center for Astrophysics and sponsored by the Breakthrough Initiatives. Breakthrough Discuss is an academic forum for scientists focused on novel ideas for space exploration and the search for life in the Universe. The 2017 conference focused on the following three sessions:

    1. Observations of Proxima b and Habitable Planets around Nearby Cool Stars – Chaired by Olivier Guyon – Co-chairs: David Charbonneau and Lisa Kaltenegger

    2. SETI Observations of Proxima b and Nearby Stars – Chaired by Jill Tarter – Co-chairs: Tabetha Boyajian, Andrew Siemion, Jason Wright and Shelley Wright

    3. Scientific Goals and Instrumentation for a Flyby of the Nearest Stars Chaired by Avi Loeb – Co-chairs: Phil Lubin, Zac Manchester and Mason Peck

  • Black Holes Are Finally in Vogue - by Avi Loeb

    1:31:49

    Colloquium by Avi Loeb, Director of the Black Hole Initiative at Harvard, hosted by the Copernicus Webinar Series.

    Abstract: With black holes, what you see is not what you get. They are extreme structures of spacetime that represent the ultimate prison, from where even light cannot escape. After decades of being a subject of mathematical interest, recently black holes became a topic of direct observational studies, for which two Nobel prizes were awarded over the past three years. I will describe some of the most exciting frontiers in current multi-messenger studies of astrophysical black holes.

  • Avi Loeb on Oumuamua, Aliens, Space Archeology, Great Filters, and Superstructures

    2:19:20

    Avi Loeb, Professor of Science at Harvard University, joins us to discuss a recent interstellar visitor, if we've already encountered alien technology, and whether we're ultimately alone in the cosmos.

     Topics discussed in this episode include:

    -Whether 'Oumuamua is alien or natural in origin
    -The culture of science and how it affects fruitful inquiry
    -Looking for signs of alien life throughout the solar system and beyond
    -Alien artefacts and galactic treaties
    -How humanity should handle a potential first contact with extraterrestrials
    -The relationship between what is true and what is good

    You can find the page for this podcast here:

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    Timestamps:
    0:00 Intro
    0:09 What is 'Oumuamua's wager?
    9:09 The properties of 'Oumuamua and how they lend credence to the theory of it being artificial in origin
    17:23 Theories of 'Oumuamua being natural in origin'
    20:48 Why was the smooth acceleration of 'Oumuamua significant?
    23:00 What are comets and asteroids?
    28:32 What we know about Oort clouds and how 'Oumuamua relates to what we expect of Oort clouds
    34:03 Could there be exotic objects in Oort clouds that would account for 'Oumuamua
    38:56 What is your credence that 'Oumuamua is alien in origin?
    46:18 Bayesian reasoning and 'Oumuamua
    48:16 How do UFO reports and sightings affect your perspective of 'Oumuamua?
    57:17 Might alien artefacts be more common than we expect?
    1:02:06 The Drake equation
    1:05:29 Where are the most likely great filters?
    1:18:37 Difficulties in scientific culture and how they affect fruitful inquiry
    1:36:52 The cosmic endowment, traveling to galactic clusters, and galactic treaties
    1:41:57 Why don't we find evidence of alien superstructures?
    1:47:44 Looking for the bio and techno signatures of alien life
    1:52:30 Do alien civilizations converge on beneficence?
    1:55:34 Is there a necessary relationship between what is true and good?
    2:00:08 Is morality evidence based knowledge?
    2:01:32 Axiomatic based knowledge and testing moral systems
    2:08:17 International governance and making contact with alien life
    2:10:25 The need for an elite scientific body to advise on global catastrophic and existential risk
    2:15:02 What are the most fundamental questions?

    This podcast is possible because of the support of listeners like you. If you found this conversation to be meaningful or valuable, consider supporting it directly by donating at: Contributions like yours make these conversations possible.

  • We Might Not Be Alone In The Universe | The Overview

    18:21

    Gadi Schwartz on one of the biggest existential questions of the time: other intelligent life.

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  • Avi Loeb - Life in the Cosmos

    11:05

    We do not yet know how life first formed on earth, but no scientist argues that it can never be explained in material terms. How prevalent is life throughout the universe? We now know that there are likely even more planets than there are stars. So, is life in the cosmos prevalent or rare? Either answer yields profound implications.

    Free access to Closer to Truth's library of 5,000 videos:

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    Abraham (Avi) Loeb is an American/Israeli theoretical physicist who works on astrophysics and cosmology and the Frank B. Baird, Jr. Professor of Science at Harvard University.

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    Closer to Truth presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.

  • This Harvard scientist believes alien life may be nearby

    3:19

    Harvard science professor Avi Loeb says the shape of the object looks so peculiar, it may have an artificial origin.


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  • Open Space 16: Breakthrough Starshot. Traveling To Other Stars, With Prof. Avi Loeb

    1:1:40

    Professor Avi Loeb is one of the hardest working astrophysicists in the field, writing a blistering number of academic papers on fascinating topics like the Fermi Paradox, the habitability of other worlds, black holes, and the history of the early universe. He's also one of the people working on the Breakthrough Starshot project to send tiny probes to other star systems.



    00:17 Our biggest disagreement. The name for Milky Way and Andromeda
    02:55 How to prevent losing stars in the future.
    03:30 Introduction to Dr. Avi Loeb, the hardest working person in astrophysics
    08:25 Breakthrough starshot, traveling to other stars
    15:33 How will they communicate back to Earth?
    19:15 Why aren't we doing to use them in the Solar System first?
    24:48 How will they slow down?
    27:21 What kind of camera could we use?
    30:13 What could we do to create a laser highway?
    34:26 Searching for life is a scientific question
    37:00 More water worlds than terrestrial planets.
    41:52 Galactic panspermia
    44:49 Fighting against our dark energy future.
    49:20 Joining the galaxy cluster
    51:49 When will we see the first pictures from the Event Horizon Telescope

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    Chloe Cain - Instagram: @chloegwen2001

  • New Book Extraterrestrial: The First Sign of Intelligent Life Beyond Earth

    7:17

    A Harvard professor says an alien visited in 2017 and more are coming

  • The Past and Future of Our Universe with Avi Loeb | CfA

    24:59

    As the expansion of the universe accelerates, every galaxy that now fills the night sky will pass beyond our visible horizon. Cosmology will no longer be an observational science because all we will be able to observe is our own galaxy. At that time, will we have to take the story of the Big Bang on faith? Avi Loeb considered that distant future at an event to celebrate the 50th anniversary of the discovery of the Big Bang (via detection of the cosmic microwave background). Part of the Observatory Night lecture series at the Harvard-Smithsonian Center for Astrophysics.

  • A Profile of Astrophysicist Avi Loeb

    7:01

    Avi Loeb's life story and scientific contributions are highlighted in this video from the Smithsonian Science Education Center. Avi Loeb is the Frank B. Baird Jr. Professor of Science at Harvard University. He serves as Chair of the Department of Astronomy, founding director of Harvard's Black Hole Initiative and director of the Institute for Theory and Computation (ITC) . He also chairs the Advisory Committee for the Breakthrough Starshot Initiative, serves as the Science Theory Director for all Initiatives of the Breakthrough Prize Foundation, and holds the Sackler Senior Professorship by Special Appointment at Tel Aviv University. He is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, the International Academy of Astronautics, and a member of the Board on Physics and Astronomy of the National Academies.

  • Why Oumuamua May Have Been The First Sign of Intelligent Life with Dr. Avi Loeb

    1:46:27

    In this interview with Avi Loeb, the Frank B. Baird, Jr., Professor of Science and astrophysicist at Harvard University, he explains why in his new book, Extraterrestrial: The First Sign of Intelligent Life Beyond Earth, he has put forth the theory that our first interstellar visitor to be spotted in our solar system, Oumuamua, might just be the first sign of intelligent life beyond earth.

    Extraterrestrial: The First Sign of Intelligent Life Beyond Earth affiliate link

    Loeb, A., 2018, Six Strange Facts About`Oumuamua, Scientific American:

    Bialy, S. & Loeb, A., 2018, Could Solar Radiation Pressure Explain ‘Oumuamua’s Peculiar Acceleration?, ApJ, 868, 1:

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    Music featured on Event Horizon
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    Ending Song: Ascent by Stellardrone





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  • Astronomer doubles down: Oumuamua could be alien craft

    1:24

    For story suggestions or custom animation requests, contact tips@nextanimation.com.tw. Visit to view News Direct's complete archive of 3D news animations.


    RESTRICTIONS: Broadcast: NO USE JAPAN, NO USE TAIWAN Digital: NO USE JAPAN, NO USE TAIWAN
    Oumuamua is the first interstellar object ever observed by humans. It was discovered on 19 October 2017, when it was about 33 million kilometers from Earth, and already heading away from Earth.


    RUNDOWN SHOWS:
    1. Show Oumuamua tumbling in space
    2. We see object falling faster, approaching Earth's solar system
    3. Object starts to enter solar system, passes close to sun
    4. Object's trajectory bends around sun
    5. Object shoots out in different direction, exits solar system
    6. Different angle of solar system and object's trajectory in relation to it


    VOICEOVER (in English):
    Oumuamua is the first interstellar object ever observed by humans. It was discovered on 19 October 2017, when it was about 33 million kilometers from Earth, and already heading away from Earth.


    Scientists were unable to get a clear picture of how the object looked, but estimate it is roughly a cigar-shaped object that entered the solar system at an unusual orbit and unusually high speed.


    Researchers found it hard to determine some of the phenomena displayed by the object.


    One scientist, Avi Loeb, published an article in 2018 stating that the object could be a light sail or probe sent intentionally to Earth's vicinity by an alien civilization.


    Other astro-physicists were not impressed. In 2019, an international team of researchers published a study and said they found that Oumuamua's properties are consistent with a natural origin.


    But Loeb replied in 2020 that the data we gathered on Oumuamua is incomplete. He added that to learn more, we must continue to monitor the sky for similar objects.


    According to Forbes magazine, Loeb's new book doubles down on his claim that the object could have been an alien craft.




    SOURCES: Forbes, CBS News, Livescience.com, Futurism.com






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  • Oumuamua, neither an asteroid nor a comet. What is it?

    14:06

    Tonya Hall interviews Dr. Avi Loeb, astrophysicist at Harvard University, about his best-seller book Extraterrestrial.

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  • Oumuamua: A Mysterious Interstellar Interloper

    59:40

    Amaya Moro-Martin, Space Telescope Science Institute

    During the formation of our solar system, a tremendous number of asteroids, comets, and planetesimals were ejected into interstellar space by gravitational encounters. If extrasolar planetary systems, which are now known to be quite common, experienced a similar development, then our galaxy should be teeming with these expelled objects. Astronomers were perplexed that none had been found passing through our solar system.

    Then, in 2017, the discovery of ‘Oumuamua transformed the situation from puzzlement to bewilderment. Observations with a wide range of telescopes followed the brightness and trajectory of this first interstellar interloper but left important questions about its origin and composition unanswered. Further, what process was responsible for the non-gravitational acceleration found in its unbound orbit?

    This cosmic visitor will not return to provide explanations. Thus, the intriguing inquiries ‘Oumuamua left behind will remain as we seek out and study other guests from beyond our solar system.

    Host: Frank Summers, Space Telescope Science Institute
    Recorded live on Tuesday, July 7, 2020
    More information:

  • New Vistas in Astronomy presents Extraterrestrial Life: Are We the Sharpest Cookies in the Jar?

    1:31:39

    Join us online for the 51st year of the New Vistas in Astronomy lecture series at Whipple Observatory. This year we are pleased to welcome speakers from across the many scientific divisions of the Center for Astrophysics | Harvard & Smithsonian.

    Some animations in this video were provided by Breakthrough and Breakthrough Starshot. Learn more at:

    February 6, 2021

    Extraterrestrial Life: Are We the Sharpest Cookies in the Jar?

    by Avi Loeb, Professor of Science at Harvard University

    The search for extraterrestrial life is one of the most exciting frontiers in Astronomy. First tentative clues were claimed close to Earth: the weird interstellar object `Oumuamua and the cloud deck of Venus. Our civilization will mature once we find out who resides on our cosmic street by searching with our best telescopes for unusual electromagnetic flashes, industrial pollution of planetary atmospheres, artificial light or heat, artificial space debris or something completely unexpected. We might be a form of life as primitive and common in the cosmos as ants are in a kitchen. If so, we can learn a lot from others out there.


    The lecture will feature content from Dr. Loeb's new book Extraterrestrial, available for order at:




    About Dr. Loeb

    Abraham (Avi) Loeb is the Frank B. Baird, Jr., Professor of Science at Harvard University. He received a PhD in Physics from the Hebrew University of Jerusalem in Israel at age 24 (1980-1986), led the first international project supported by the Strategic Defense Initiative (1983-1988), and was subsequently a long-term member of the Institute for Advanced Study at Princeton (1988-1993). Loeb wrote 8 books and over 750 papers on a wide range of topics, including black holes, the first stars, the search for extraterrestrial life and the future of the Universe. He had been the longest serving Chair of Harvard's Department of Astronomy (2011-2020), Founding Director of Harvard's Black Hole Initiative (2016-present) and Director of the Institute for Theory and Computation (2007-present) within the Harvard-Smithsonian Center for Astrophysics . He serves as Chair of the Board on Physics and Astronomy of the National Academies (2018-present) and is an elected fellow of the American Academy of Arts & Sciences, the American Physical Society, and the International Academy of Astronautics. Loeb is a member of the President's Council of Advisors on Science and Technology (PCAST) at the White House and a member of the Advisory Board for Einstein: Visualize the Impossible of the Hebrew University. He also chairs the Advisory Committee for the Breakthrough Starshot Initiative (2016-present) and serves as the Science Theory Director for all Initiatives of the Breakthrough Prize Foundation. In 2012, TIME magazine selected Loeb as one of the 25 most influential people in space. Click here for Loeb's commentaries on innovation and diversity.


    Personal website:

  • Author Talk - Extraterrestrial: The First Signs of Intelligent Life Beyond Earth

    1:7:09

    Presented by Chappaqua Library with Avi Loeb September 20, 2021

  • GMALL Lectures - ‘Oumuamua: The Scout from Interstellar Space

    1:23:53

    John Delano, Distinguished Teaching Professor Emeritus of the Department of Atmospheric and Environmental Sciences at SUNY, Albany, takes us on a thrilling exploration of two major hypotheses concerning the ‘Oumuamua, the first observed interstellar object.

  • Harvard Professor Launches New Search For Extraterrestrial Life

    1:31

    Avi Loeb, who said that an interstellar object spotted in our solar system back in 2017 was an alien creation, now wants to look for more. WBZ-TV's Anaridis Rodriguez reports.

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