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Asteroids - Threats from Cosmos | SPACETIME - SCIENCE SHOW

  • Killer Asteroids - Space Documentary


    Killer Asteroids - Space Documentary
    NASA's WISE mission has tracked down 93 percent of the 1 kilometer diameter or larger asteroids whose size could devastate our planet. The project's asteroid census has revised the total number of NEO's down from 36,000 to 20,500.

  • Are We In Danger Of An Asteroid Attack? | Cosmic Travellers | Spark


    The 1997 documentary Cosmic Travellers: Comets and Asteroids shows an era of excitement and fear about the possibilities of space. Predating the modern technology propelling us through space exploration today, the scientists studying the travel paths of comets and asteroids give us an insight on their research. From simulations of an asteroid impact on Earth, to sending astronauts to their surface, we’ll learn of the ways we can use comets to study the origins of life, and the catastrophic disasters that could be looming in our future.

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    Content licensed from Syndicado to Little Dot Studios. Produced by Adler Media.

    #Space #Spacetravel #Asteroids #Comets #Cosmictravellers #90s #naturaldisaster #technology #enigineering #rockets #astronauts #education

  • How to become an astronaut? | SPACETIME - SCIENCE SHOW


    To look at the Earth from outer space - who doesn’t dream about that view? But is being an astronaut really a dream job? Are the years of training and hardships each candidate must be willing to endure really worth it? Prof. Dr. Ulrich Walter, astronaut and space expert, knows what he’s talking about because he did it. In this episode of Spacetime, he shows what demands are asked of today's applicants and recounts stories of legendary astronauts.

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    #Astronaut #Space #SpaceTime

  • Catastrophe - Episode 5 - Survival Earth


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    Every other Wednesday we present a new video, so join us to see the truth laid bare...

    This spectacular five-part documentary series, presented by Tony Robinson, investigates the history of natural disasters, from the planet's beginnings to the present, putting a new perspective on our existence and suggesting that we are the product of catastrophe.

    99% of all the creatures that have ever lived, no longer exist. They were wiped-out in a series of global catastrophes. Each disaster changed the course of evolution on earth. Without them mankind, nor any of the life we see around us, would be here today. For out of catastrophe comes rebirth. Evolution is a savage, imperfect and violent process. It's survive or perish. The earth's history of catastrophes has both moulded the planet and determined evolution. For each disaster led to another leap forward on the evolutionary trail form single celled bacteria to humankind itself.

    Episode 5 - Survival Earth

    So far, humans have been lucky not to have experienced catastrophes on a global scale, like those that have extinguished 99% of all other species. Humans have come to reside as the most powerful species on this planet, but it is easy to forget that the forces that wiped out many of our ancestors are still at work. In this final programme, Catastrophe maps out key events over the last 75,000 years. During that time humans were subjected to a super-volcano that nearly devastated whole regions of Earth. The ensuing ice age that covered Europe with ice sheets many kilometres thick is said to have thwarted the development of complex civilisation, and the cosmic catastrophe that followed is believed to have changed life forever for the early inhabitants of North America.

  • Killer Asteroid threat- Averting Armageddon- BBC Documentary


    Could a 1km killer asteroid hit Earth with 20 times the power of all the nuclear weapons on the planet? Watch this video from BBC science show 'Averting Armageddon' to find out more.

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  • Science Bulletins: Impact! Tracking Near-Earth Asteroids


    Collisions between space objects are a vital part of the evolution of our Solar System. Most of Earth's impact craters have been wiped away due to plate tectonics, but evidence of such cosmic catastrophes, such as Arizona's 50,000-year-old meteor crater, do remain. When is Earth due for another major blast? Meet the professional and amateur astronomers who may be the first to know: first at LINEAR, a near-earth asteroid detection facility in New Mexico, and then at the Smithsonian's Minor Planet Center, where orbits of near-earth objects are tracked for possible hits and misses.

    Science Bulletins is a production of the National Center for Science
    Literacy, Education, and Technology (NCSLET), part of the Department of
    Education at the American Museum of Natural History. This visualization
    was supported by the National Oceanic and Atmospheric Administration

  • What Can We Learn From Asteroids? | Cosmic Travelers: Comets And Asteroids | Absolute Science


    The 1997 documentary Cosmic Travellers: Comets and Asteroids shows an era of excitement and fear about the possibilities of space. Predating the modern technology propelling us through space exploration today, the scientists studying the travel paths of comets and asteroids give us an insight on their research. From simulations of an asteroid impact on Earth, to sending astronauts to their surface, we’ll learn of the ways we can use comets to study the origins of life, and the catastrophic disasters that could be looming in our future.

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  • Naked Science - Comets


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    Harbingers of doom or givers of life?

    Comets, distant travellers from the outer reaches of our solar system, have captured the imagination of man and have long been shrouded in mystery. Now through Earth based observations and an increasing number of space probes, their origins and nature are becoming unveiled. Naked Science explores behind the legend to reveal what a comet actually is, what secrets they hold for our understanding of how the solar system was formed; shed light on the theory that they brought the building blocks of life to earth and their potential for wiping out life as we know it.

  • Defending Earth from Asteroids with Neil deGrasse Tyson


    There are about a million near-Earth asteroids that are large enough to substantially damage or destroy a major city, as evidenced by the explosion over Chelyabinsk, Russia, in February 2013 of a meteor no bigger than a large truck, which injured more than 1,000 people.

    With current space technology, scientists know how to deflect the majority of hazardous near-Earth objects. But prevention is only possible if nations work together on detection and deflection. Learn about the risks, and the steps that are needed to avoid these potential natural disasters, from a group of astronauts and cosmonauts who recently helped develop recommendations to the United Nations for defending Earth from asteroid impact in this discussion.

    This program, which was streamed live on the web, took place at the American Museum of Natural History on October 25, 2013, the same week the United Nations General Assembly adopted measures creating an international decision-making mechanism for planetary asteroid defense. The event was co-hosted by the American Museum of Natural History and the Association of Space Explorers (ASE).

    Neil deGrasse Tyson, who is the Frederick P. Rose Director of the Hayden Planetarium, hosted the discussion with participants Thomas Jones, former NASA astronaut, senior research scientist at the Florida Institute for Human and Machine Cognition, and Association of Space Explorers (ASE) Near Earth Objects Committee member; Russell Schweickart, former NASA astronaut, ASE co-founder and Near Earth Objects Committee member, and co-founder and chairman emeritus of the B612 Foundation; Dumitru-Dorin Prunariu, former Romanian astronaut, ASE co-founder and Near Earth Objects Committee member, and vice president of the European International Institute for Risk, Security, and Communication Management; Edward Lu, former NASA astronaut, ASE Near Earth Objects Committee member, and co-founder, chairman, and CEO of the B612 Foundation; and Soichi Noguchi, engineer and JAXA astronaut, and ASE Near Earth Objects Committee member.

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  • The Doomsday Asteroid Impact


    The #Doomsday #Asteroid

    We live in a rough neighbourhood. We often think of our solar system as a vast and empty space populated by a few planets with their orbiting moons. But our solar system is besieged by debris left over from its birth. And we get periodic reminders of this. Much of the debris is small and harmless and is just interplanetery dust that frequently strikes the Earth and burns up in the upper atmosphere. We frequently see this burning up in the night sky as meteors. But there is much evidence to put us on our guard. There are more menacing intruders out there that have the potential to terrorize humanity. The probability of an asteroid or comet colliding with the Earth is small, but this thought should be put in the context of the consequences of a collision - which could be catastrophic. While both asteroids and comets pose a threat, asteroids are the greater threat due to their numbers, size, composition and proximity to our planet Earth.

  • Stopping an Asteroid Apocalypse | How the Universe Works


    New discoveries and cutting-edge tech reveal just how close we are to an asteroid apocalypse and what it would take for the world's leading space agencies to stop it.

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  • Catastrophe - Episode 4 - Asteroid Impact


    Subscribe to Naked Science -

    Every other Wednesday we present a new video, so join us to see the truth laid bare...

    This spectacular five-part documentary series, presented by Tony Robinson, investigates the history of natural disasters, from the planet's beginnings to the present, putting a new perspective on our existence and suggesting that we are the product of catastrophe.

    99% of all the creatures that have ever lived, no longer exist. They were wiped-out in a series of global catastrophes. Each disaster changed the course of evolution on earth. Without them mankind, nor any of the life we see around us, would be here today. For out of catastrophe comes rebirth. Evolution is a savage, imperfect and violent process. It's survive or perish. The earth's history of catastrophes has both moulded the planet and determined evolution. For each disaster led to another leap forward on the evolutionary trail form single celled bacteria to humankind itself.

    Episode 4 - Asteroid Impact

    Dinosaurs rose up as rulers of Earth around 230 million years ago, eventually dominating all other species and relegating mammals to the shadows. But 65 million years ago their planet was rocked by yet another massive event when, seemingly out of nowhere, the mighty dinosaurs were wiped off the face of Earth. But without this devastating catastrophe, humans would not be here today.

    This film explores the trail of clues that lead to what extinguished the dinosaurs and ultimately led to the evolution of humans. Cutting-edge scientists, palaeontologists and geologists investigate what could be responsible, and chart the story behind the widely held theory that Earth was hit once again by a deadly asteroid.

  • NASA Plans to Slam a Spacecraft Into an Asteroid


    What if a deadly asteroid was on a collision course to Earth? NASA and the ESA have come up with a solution.
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    Asteroids impacting Earth can be devastating—killing all the dinosaurs in existence level devastating. But even the asteroids that aren’t mass-extinction huge can be a serious threat.

    Every few thousand years Earth (a.k.a. you and I) get hit with a massive asteroid the size of the Great Pyramid of Giza, so what is the plan when we get hit with the next asteroid?

    We get hit with an asteroid about the size of the Great Pyramid of Giza every few thousand years, and when the next one hits it could cause massive damage to an entire region. So when we spot the next one coming, what’s the plan?

    Enter: NASA’s Planetary Defense Coordination office.

    The Planetary Defense Coordination office is tasked with coming up with ways to protect the planet from threats from outer space.

    And one of their great ideas is to smack a spacecraft head on with an oncoming asteroid to see if it can be slowed down and deflected. Members of NASA, the European Space Agency, and others are informally collaborating with a pair of missions that together are known as the Asteroid Impact and Deflection Assessment, or AIDA.

    NASA is up first with a mission called the Double Asteroid Redirection Test, or DART. The launch window opens on July 22, 2021, and the goal is to nail an asteroid by late September or early October the following year.

    Pretty cool, huh?

    The target DART is aiming at is one of a pair of binary asteroids called Didymos B. Didymos is Greek for twin, hence the Double part of DART.

    While the asteroid is not on a trajectory to hit Earth, it is an ideal candidate to see just how much of an impact will affect it because Didymos B is a moonlet 160 meters across that’s orbiting the much larger asteroid Didymos A, and as luck would have it, from our perspective it passes in front and behind the larger body, causing changes in the system’s brightness that we can measure.

    When DART hits Didymos B at 6.6 kilometers per second, the asteroid’s speed will change by a fraction of a percent, but that’s enough to change the time it takes to orbit Didymos A by several minutes. Enough to be detected by telescopes roughly 11 million kilometers away here on Earth.

    And not any old spacecraft will do when it comes to smashing into Didymos B.

    Find out more about the spacecraft that will be used on this asteroid deflection mission and more on this episode of Elements.

    #Asteroid #NASA #Earth #Space #Exploration #Seeker #Science #Elements

    Read More:
    We’re going to slam a spacecraft into an asteroid to try to deflect it

    An Earth-bound asteroid wouldn’t have to be huge to be a problem. Even something just a couple of hundred feet across could cause widespread devastation if it hit a town or city.

    DART: Double Asteroid Redirection Test

    An on-orbit demonstration of asteroid deflection is a key test that NASA and other agencies wish to perform before any actual need is present.


    Planning for humankind’s first mission to a binary asteroid system has entered its next engineering phase.


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  • Killer Asteroids - Strip The Cosmos


    Asteroid Day is edging closer and we are giving you a sneak peek of Strip The Cosmos episode Killer Asteroids.

    in this clip we examine how killer asteroids are formed and the secrets of the early solar system.


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  • Planetary Defense: Avoiding a Cosmic Catastrophe


    (01:21 - Start of Presentation)
    Our planet has been continually bombarded by asteroids since its formation, 4.5 billion years ago. While the frequency of large impacts has decreased, many potential Near-Earth Object threats remain undiscovered, so if or when they will impact Earth remains unknown. Fortunately, if an Earth-threatening asteroid is discovered in time, there are ways to mitigate or even prevent a disaster. Scientists at LLNL provide computer simulations in preparation these scenarios so if the time comes where an asteroid is headed our way, we will be prepared. [Show ID: 35698]

    More from: Lawrence Livermore National Lab Science on Saturday

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  • Departure to Mars - Conquest of a Planet | SPACETIME - SCIENCE SHOW


    SPACETIME - SCIENCE SHOW: August the 2nd, 2048. A space craft has just reached Mars. The crew has landed on the Red Planet: One giant leap for mankind. Seventy-nine years after the first moon landing man has set foot on another planet. This is a fictional scenario. But men on Mars will become a reality. We have known ever since the 1960s what it looks like on Mars. Dozens of probes have visited the Red Planet and sent back photographs and data. There have been reports of storms and barren deserts. In the end we are left with more questions than answers - especially the burning question of life, past or present, on our neighbour planet.
    Only a manned mission to Mars will solve the riddle once and for all, when scientists and engineers research the Red Planet on the spot.

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  • Neil deGrasse Tyson On Coronavirus: Will People Listen To Science?


    America's favorite astrophysicist, who hosts Cosmos: Possible Worlds on NatGeo, hopes that the public will pay attention to the information provided by professional scientists about the Coronavirus. #Colbert #Coronavirus #NeildeGrasseTyson

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  • Asteroid Careens by as Meteor Delivers Buzz Cut to Earth


    On the same day as a meteor hit Russia, an asteroid careened towards Earth. Jeffrey Brown talks to astrophysicist Neil deGrasse Tyson about this cosmic coincidence, how the meteor and asteroid came so close to Earth, what risks it poses and why this is a 'wake-up call.'

  • ????Scientists Predict That Meteor Will Collide With Earth In 2029 | Discovery UK


    Learn more about Earth's history with meteor collisions and find out about the asteroid that scientists predict will crash into the Earth in the near future.
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  • How to stop giggling - Asteroid hits Jupiter- Averting Armageddon- BBC Documentary


    A group of scientists who were once mocked for their 'end of the world' asteroid explosion beliefs are given new respect by the astronomical community when a massive asteroid is discovered on an impact path with the planet Jupiter. Fascinating video from BBC science show 'Averting Armageddon'.

    This is a commercial channel from BBC Studios. Service & Feedback

  • Earth Threatening Asteroids


    Dr. Bill Ailor's presentation on the threat of asteroids hitting earth and actions that are or can be taken to mitigate risk. Produced by Jarel & Betty Wheaton for Peninsula Seniors

  • Anthropocene Astronomy: Thwarting Dangerous Asteroids Begins with Finding Them | Ed Lu


    Are humans smarter than dinosaurs? We haven’t proved it yet.

    In the long now, the greatest threat to life on Earth, or (more frequently) to civilization, or (still more frequently) to cities, is asteroid impact. The technology exists to eliminate the threat permanently. It is relatively easy and relatively cheap to do. However to date, government organizations have not made this a priority. That leaves nonprofits and private funding. Considerable efficiency may be gained by going that route.

    Ed Lu is CEO and Chairman of the B612: Foundation, which, in partnership with Ball Aerospace is building an asteroid-detection system called Sentinel, aiming for launch in 2018. A three time NASA astronaut, Lu is also the co-inventor of the “gravity tractor” -- one of the several techniques that can be used to nudge threatening asteroids out their collision paths with Earth.

    Asteroid threat is an attention-span problem blended with a delayed-gratification problem---exactly the kind of thing that Long Now was set up to help with. Taking the extreme danger of asteroids seriously requires thinking at century and millennium scale. Dealing with the threat requires programs that span decades, because asteroids can only be deflected if they are found and dealt with many years before their potential impact. The reality is that the predictability of orbital mechanics makes cosmic planetary defense completely workable. Sometimes real science is more amazing than science fiction.

    On February 15th of this year, civilization got a wake-up call. A 45 meter asteroid, large enough to completely obliterate a major city, missed Earth by only 17,000 miles, and hours later a smaller rock, 17 meters in diameter, exploded in the air over Chelyabinsk, Russia, injuring 1500 people. Interest in B612’s asteroid detection mission spiked accordingly.

    Anthropocene Astronomy: Thwarting Dangerous Asteroids Begins with Finding Them was given on June 18, 02013 as part of Long Now's Seminar series. The series was started in 02003 to build a compelling body of ideas about long-term thinking from some of the world's leading thinkers. The Seminars take place in San Francisco and are curated and hosted by Stewart Brand. To follow the talks, you can:

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  • How Close To The Sun Can Humanity Get? | Space Time


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    Previous Episode:
    Reversing Entropy with Maxwell's Demon

    The Sun: an entity worshipped as a god throughout time and across cultures. The source of all life and sustenance for our little blue space rock, and also a force of unthinkable destructive power. But soon humanity will reach out its collective hand and come closer to touching the Sun than we ever have before with the launch of the Parker Solar Probe.

    Hosted by Matt O'Dowd
    Written by Drew Rosen and Matt O'Dowd
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  • NASA Talk - Path to Mars and Asteroid Mission: The First Step


    The Space Technology and Exploration Directorate at NASA Langley Research Center presented a five-part lecture series on “The Future of America’s Space Exploration Program” on the campus of Christopher Newport University. Each 75-minute lecture took place at the Yoder Barn Theatre in Newport News, Virginia and explores the ins and outs of America’s vision for deep space exploration.

    Lecture 1: Path to Mars and Asteroid Redirect Mission: The First Step
    Lecture 2: The Next Human Spacecraft: Orion and the Launch Abort System
    Lecture 3: Escaping Earth’s Gravity: Space Launch System
    Lecture 4: Mars Entry, Descent and Landing with Humans
    Lecture 5: Spacecraft, Habitats and Radiation Protection

  • Cosmic Journeys - Earth in 1000 Years


    This edition of COSMIC JOURNEYS explores the still unfolding story of Earth's past and the light it sheds on the science of climate change today. While that story can tell us about the mechanisms that can shape our climate. it's still the unique conditions of our time that will determine sea levels, ice coverage, and temperatures.

    Ice, in its varied forms, covers as much as 16% of Earth's surface, including 33% of land areas at the height of the northern winter. Glaciers, sea ice, permafrost, ice sheets and snow play an important role in Earth's climate. They reflect energy back to space, shape ocean currents, and spawn weather patterns.

    But there are signs that Earth's great stores of ice are beginning to melt. To find out where Earth might be headed, scientists are drilling down into the ice, and scouring ancient sea beds, for evidence of past climate change. What are they learning about the fate of our planet... a thousand years into the future and even beyond?

    30,000 years ago, Earth began a relentless descent into winter. Glaciers pushed into what were temperate zones. Ice spread beyond polar seas. New layers of ice accumulated on the vast frozen plateau of Greenland. At three kilometers thick, Greenland's ice sheet is a monumental formation built over successive ice ages and millions of years. It's so heavy that it has pushed much of the island down below sea level. And yet, today, scientists have begun to wonder how resilient this ice sheet really is.

    Average global temperatures have risen about one degree Celsius since the industrial revolution. They could go up another degree by the end of this century. If Greenland's ice sheet were to melt, sea levels would rise by over seven meters. That would destroy or threaten the homes and livelihoods of up to a quarter of the world's population.

    With so much at stake, scientists are monitoring Earth's frozen zones... with satellites, radar flights, and expeditions to drill deep into ice sheets. And they are reconstructing past climates, looking for clues to where Earth might now be headed... not just centuries, but thousands of years in the future.

    Periods of melting and freezing, it turns out, are central events in our planet's history.
    That's been born out by evidence ranging from geological traces of past sea levels... the distribution of fossils... chemical traces that correspond to ocean temperatures, and more.

    Going back over two billion years, earth has experienced five major glacial or ice ages. The first, called the Huronian, has been linked to the rise of photosynthesis in primitive organisms. They began to take in carbon dioxide, an important greenhouse gas. That decreased the amount of solar energy trapped by the atmosphere, sending Earth into a deep freeze.

    The second major ice age began 580 million years ago. It was so severe, it's often referred to as snowball earth. The Andean-Saharan and the Karoo ice ages began 460 and 360 million years ago. Finally, there's the Quaternary... from 2.6 million years ago to the present. Periods of cooling and warming have been spurred by a range of interlocking factors: the movement of continents, patterns of ocean circulation, volcanic events, the evolution of plants and animals.

    The world as we know it was beginning to take shape in the period from 90 to 50 million years ago. The continents were moving toward their present positions. The Americas separated from Europe and Africa. India headed toward a merger with Asia. The world was getting warmer. Temperatures spiked roughly 55 million years ago, going up about 5 degrees Celsius in just a few thousand years. CO2 levels rose to about 1000 parts per million compared to 280 in pre-industrial times, and 390 today.

    But the stage was set for a major cool down. The configuration of landmasses had cut the Arctic off from the wider oceans. That allowed a layer of fresh water to settle over it, and a sea plant called Azolla to spread widely. In a year, it can soak up as much as 6 tons of CO2 per acre. Plowing into Asia, the Indian subcontinent caused the mighty Himalayan Mountains to rise up. In a process called weathering, rainfall interacting with exposed rock began to draw more CO2 from the atmosphere... washing it into the sea. Temperatures steadily dropped.

    By around 33 million years ago, South America had separated from Antarctica. An ice sheet formed. In time, with temperatures and CO2 levels continuing to fall, the door was open for a more subtle climate driver. It was first described by the 19th century Serbian scientist, Milutin Milankovic.

    He saw that periodic variations in Earth's rotational motion altered the amount of solar radiation striking the poles. In combination, every 100,000 years or so, these variations have sent earth into a period of cool temperatures and spreading ice.

  • The Chelyabinsk Meteor: Can We Survive a Bigger Impact?


    Nov. 6, 2013
    Dr. David Morrison (SETI Institute and NASA Ames Research Center)
    In February 2013, a rocky projectile entered the Earth's atmosphere traveling at more than 11 miles per second. It was about 65 feet in diameter and its explosion, at an altitude of 14 mi, released energy of about half a megaton, equivalent to a couple dozen Hiroshima-sized atom bombs. About two minutes later, the shock wave reached the ground in Chelyabinsk, Russia, breaking windows and injuring about 1500 people from flying glass. It struck without warning. Has this event served as a kind of cosmic wake-up call for planetary defense? NASA recently announced a 'grand challenge to find all asteroids that could threaten human populations, and to figure out how to deal with them. David Morrison, a nationally-recognized expert about asteroids, discusses the Chelyabinsk impact and evaluates ways we might meet the grand challenge to protect our population from space impacts.

  • Asteroid Hunters - KQED QUEST


    Everyone knows that eight planets orbit the Sun. But thousands of other objects, including icy comets and football field-sized asteroids, are also zooming around our solar system. And some of them could be on a collision course with Earth. QUEST explores how these Near Earth Objects are being tracked and what scientists are saying should be done to prevent a deadly impact.

  • Adventures of an asteroid hunter | Carrie Nugent


    TED Fellow Carrie Nugent is an asteroid hunter -- part of a group of scientists working to discover and catalog our oldest and most numerous cosmic neighbors. Why keep an eye out for asteroids? In this short, fact-filled talk, Nugent explains how their awesome impacts have shaped our planet, and how finding them at the right time could mean nothing less than saving life on Earth.

    TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and much more.
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  • The Dangerous Nature of Near Earth Asteroids


    An exploration of the dangerous nature of near earth asteroids, asteroid impacts and comets. Further I explore mitigation techniques for avoiding impacts, what might happen if we were impacted, and what has happened in the past with mass extinctions.

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    Longer Way to Go by Miguel Johnson.

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  • Solar Superstorms | Spark


    Solar Superstorms is a major new production that takes viewers into the tangle of magnetic fields and superhot plasma that vent the Sun’s rage in dramatic flares, violent solar tornadoes, and the largest eruptions in the solar system: Coronal Mass Ejections. What’s driving these strange phenomena? How will they affect planet Earth? Find the answers as we venture into the seething interior of our star.

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  • Planetary Defense


    NASA’s Planetary Defense Coordination Office is responsible for detecting potentially hazardous asteroids and leading response to a potential impact threat.

    NASA 360 joins Dr. Amy Mainzer, Senior Research Scientist, NASA Jet Propulsion Center, as she discusses the ways NASA is protecting our Earth from potentially hazardous asteroids.

    Learn more about NASA's Planetary Defense Coordination Office at

  • These Were The Most Important Events In The History of the Earth


    What events were the most important events that ever happened in the history of the earth?

    The Earth- a giant hunk of rock and water that's home to the only known life in the universe. It's so vast and old that it seems unchanging, yet it has in fact experienced cataclysmic upheavals and routine facelifts over the course of its 4.5 billion year lifespan. Just like a human being, the earth ages, and as it does it goes through major changes. Hello and welcome to another episode of The Infographics Show- today we're taking a look at the most important events in the Earth's history.

    4.5 billion years ago the Earth and most of the solar system was nothing more than a ring of protoplanetary dust circling the sun. However over time gravity gradually drew individual particles of dust together, creating ever larger clumps. Eventually the clumps grew to the size of boulders, then to the size of mountains, and over many millions of years the Earth was formed. Yet this newborn earth was nothing like what you see today, with little if any water and a surface that was perpetually molten. Over millions more years the outer layer cooled however to form a crust, and planetary impacts of comets and asteroids brought all the water that you see today to the Earth from space.

    Not long after the Earth's creation it's thought that gravity put it on a collision course with another nascent planet roughly the size of Mars. This planet, named Theia, slammed into the Earth with 100 million times more energy than the impact that wiped out the dinosaurs, and hurled vaporized chunks of both bodies out into space. Gravity eventually bound the ejecta together and created our Moon. This impact gave our planet the tilt it has today, which in turn gives us our four seasons, and helped stabilize its spin- two things which scientists believe were critical for the evolution of advanced life.





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  • The SAFIRE Project Is Not Real Science


    It would seem that I've really struck a nerve by debunking some of these alternative cosmologies, and exposing the frauds that push them. In the very persistent and vocal criticisms that have been brought against me by the people who have fallen for these hoaxes, the most consistent thing they cite as though it is evidence of anything whatsoever is the SAFIRE Project. What is this circus sideshow masquerading as science? What is it that they pretend to do? Let's tell the whole story.

    My original Electric Universe debunk:
    My response to Ben Davidson:

    Someone went down the rabbit hole on SAFIRE finances with all the smoke and mirrors:
    Tax filings for ISF:
    Tax filings for MAF:

    SAFIRE's one and only paper that has nothing to do with the electric sun model:
    Montgomery Childs embarrassing himself at 2:40:
    Learn real science regarding neutrinos:
    An explanation of neutrinos that is much easier to understand:
    The Sudbury Neutrino Observatory paper:

    Tom Bridgman exposes the idiocy of Don Scott's book:
    Brian Koberlein eviscerates the Electric Universe:
    A former Velikovskian tells all:

  • Black Holes Explained – From Birth to Death


    Black holes. Lets talk about them.

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  • Science of Asteroid Entry and Impact | Man vs. the Universe


    The dangers that asteroids pose to Earth isn't just the stuff of disaster movies. The damage caused by asteroids depends on much more than their mere size. Learn about these factors and see a terrifying demonstration of the devastating damage that can be caused by atmospheric explosion of meteors. | For more, visit

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  • Asteroid investigations- Averting Armageddon- BBC Documentary


    A probe sent to one of the biggest asteroids in our solar system, Eros, is due to collect evidence before returning to Earth. Fascinating video from BBC science show 'Averting Armageddon'.

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  • Asteroids - SpaceTime with Stuart Gary S20E51


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    * It’s Asteroid day
    June 30 is asteroid day – marking the anniversary of Earth’s largest asteroid impact in recorded history, the 1908 Tunguska event when an asteroid airburst about ten kilometres above the Tunguska river region of Siberia in eastern Russia. The blast devastated 2150 square kilometers of forest leaving some 80 million trees flattened and reduced to matchwood and lit up the night skies in London -- a third of the way around the globe.

    *The effects of a major asteroid impact on Earth
    A new study has concluded that when a big asteroid hits the Earth violent winds and shock waves are likely to cause the greatest number of fatalities. The study explored seven effects associated with asteroid impacts--heat, pressure shock waves, flying debris, tsunamis, wind blasts, seismic shaking and cratering.

    *NASA’s mission to the metallic world of Psyche
    NASA’s Discovery mission to a unique metallic asteroid, has been moved up by a year with the launch now slated for the middle of 2022. The earlier launch date means a more efficient trajectory – bringing the planned arrival time forward to 2026 -- four years earlier than the original timeline.

    *Einstein right again
    A little more than 100 years after Professor Albert Einstein developed his theory of general relativity, researchers have finally been able to use its laws to directly determine the mass of a white dwarf star by the gravitational bending of light. In a 1936 paper in Science, Einstein lamented that there was no hope of directly determining a white dwarf’s mass by this method – even though theoretically it should be possible.

    *Japanese H-IIA satellite launch
    A Japanese H2A rocket has blasted into orbit carrying the nation’s second Quasi-Zenith Satellite navigation system spacecraft. Lift off for the Michibiki-2 satellite occurred under cloudy skies at the Tanegashima Space Centre south of Tokyo.

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  • How to deflect a killer asteroid- Averting Armageddon- BBC Documentary


    Scientists explore potential ways to save the world by deflecting killer asteroids. Brilliant video from BBC science show 'Averting Armageddon'.

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  • Scientists plan to test asteroid deflection


    A group of scientists released a letter Monday supporting a planned space mission to divert an asteroid.

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  • What is the Asteroid Grand Challenge?


    Learn More at:

    The Asteroid Grand Challenge is a NASA project to find all asteroid threats to the human population and know what to do about them.

    Everyone can get involved in asteroid hunting by:

    Making observations through a telescope
    Write computer code
    Creating new technology to improve detection

    Four Sections of the Challenge

    1. Detection - discover potentially dangerous asteroids
    2. Track - obtain at least 3 separate measurements to determine their orbits
    3. Characterize - determine their size, shape and composition
    4. Mitigate - study ways to stop dangerous asteroids from hitting Earth

  • Asteroids: threat or opportunity? | Massimiliano Vasile | TEDxUniversityofStrathclyde


    Asteroids are a large group of celestial objects with the most intriguing variety of shapes, orbits, composition, gravity fields. Professor Massimiliano Vasile considers why we are interested in these objects, how we can control their motion and whether they represent a threat or an opportunity.

    Professor Massimiliano Vasile is the Director of Strathclyde’s Advanced Space Concepts Laboratory and Coordinator of the Stardust Network for space debris and asteroid mitigation.

    This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at

  • Planetary Defense - Asteroid Impact Avoidance - Science at NASA


    Asteroid impact avoidance comprises a number of methods by which near-Earth objects (NEO) could be diverted, preventing destructive impact events. A sufficiently large impact by an asteroid or other NEOs would cause, depending on its impact location, massive tsunamis, multiple firestorms and an impact winter caused by the sunlight-blocking effect of placing large quantities of pulverized rock dust, and other debris, into the stratosphere.

    A collision between the Earth and an approximately 10-kilometre-wide object 66 million years ago is thought to have produced the Chicxulub Crater and the Cretaceous–Paleogene extinction event, widely held responsible for the extinction of the dinosaurs.

    While the chances of a major collision are not great in the near term, there is a high probability that one will happen eventually unless defensive actions are taken. Recent astronomical events—such as the Shoemaker-Levy 9 impacts on Jupiter and the 2013 Chelyabinsk meteor along with the growing number of objects on the Sentry Risk Table—have drawn renewed attention to such threats. NASA warns that the earth is unprepared.

    Most deflection efforts for a large object require from a year to decades of warning, allowing time to prepare and carry out a collision avoidance project, as no known planetary defense hardware has yet been developed. It has been estimated that a velocity change of just 3.5/t × 10−2 m·s−1 (where t is the number of years until potential impact) is needed to successfully deflect a body on a direct collision trajectory. In addition, under certain circumstances, much smaller velocity changes are needed. For example, it was estimated there was a high chance of 99942 Apophis swinging by Earth in 2029 with a 10−4 probability of passing through a 'keyhole' and returning on an impact trajectory in 2035 or 2036. It was then determined that a deflection from this potential return trajectory, several years before the swing-by, could be achieved with a velocity change on the order of 10−6 ms−1.

    An impact by a 10 kilometres (6.2 mi) asteroid on the Earth has historically caused an extinction-level event due to catastrophic damage to the biosphere. There is also the threat from comets coming into the inner Solar System. The impact speed of a long-period comet would likely be several times greater than that of a near-Earth asteroid, making its impact much more destructive; in addition, the warning time is unlikely to be more than a few months. Impacts from objects as small as 50 metres (160 ft) in diameter, which are far more common, are historically extremely destructive regionally (see Barringer crater).

    Finding out the material composition of the object is also helpful before deciding which strategy is appropriate. Missions like the 2005 Deep Impact probe have provided valuable information on what to expect.

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    CREDITS: National Aeronautics and Space Administration

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  • A Magical Color-changing Asteroid! - Space Radio LIVE


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    Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars (

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  • 2020 Asteroid Day LIVE - Target Asteroid: How to Move an Incoming Space Rock Panel


    Host: Alan Boyle - Aerospace and Science Editor for GeekWire

    Marco Fuchs - Owner and CEO of OHB
    Tom Jones - NASA Astronaut
    Hannah Goldberg - Senior Systems Engineer, GomSpace
    Michèle Lavagna - Professor Flight Dynamics, Politecnico Di Milano

    Launching next year, NASA’s DART spacecraft will crash headlong into a small asteroid to change the asteroid’s orbit by a small amount. Then ESA’s Hera mission will map the resulting impact crater and measure the asteroid's mass. Find out about the extraordinary mission.

    To read more about the panels and 1:1 interviews, visit:
    From the Target Asteroid's blog post about the panel (also available here):

  • How Would We Stop a Large Asteroid?


    Last week, an asteroid dubbed 2019 OK flew past the Earth closer than most asteroids. Had we been less lucky, it would have smashed into the planet with the force of 30* that the bomb that struck Hiroshima... and the scariest part? We didn't even detect it until just days before it flew past. With existing anti-asteroid technology requiring at least a year of warning, it is difficult not to look up at the night sky and be slightly afraid. If another unlikely visitor shows up just days before its collision, could we stop it? In this video, we explore the threats large asteroids pose, and how NASA, among other agencies, are planning to save the Earth from an asteroid collision.

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  • ESA Euronews: Can we deflect asteroids?


    In the edition of Space, Euronews correspondent Jeremy Wilks reports from the Observatory of the Côte d'Azur in the south of France on a unique mission to deflect an asteroid.

    Asteroids have the potential to cause a catastrophe - a small asteroid could wipe out an entire city, while a large one could mean the end for us all.

    It's a threat we're aware of, and which scientists and engineers are working to overcome.

    This video is also available in the following languages:

  • Asteroid Initiative Ideas Synthesis Workshop Cosmic Explorations A Speakers Series


  • Odds Of An Asteroid Hitting Earth Explained


    The odds of an asteroid hitting our home planet explained by Edward Lu during the Senate Commerce, Science and Transportation Subcommittee on space threats.

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  • How to Save the World from Asteroids Together - Random Space Fact 54


    No matter how you look at it, asteroid impact is an international issue that requires international coordination. Watch this video to learn what is required for an international disaster response to an asteroid threatening Earth. Learn more:

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    About The Planetary Society:
    The Planetary Society has inspired millions of people to explore other worlds and seek other life. With the mission to empower the world's citizens to advance space science and exploration, its international membership makes the non-governmental Planetary Society the largest space interest group in the world. Carl Sagan, Bruce Murray and Louis Friedman founded the Planetary Society in 1980. Bill Nye, a longtime member of the Planetary Society's Board, serves as CEO.

  • Cruising The Cosmos: Whats left over


    Watch as we go Cruising The Cosmos! This episode covers the after math of the destruction in the early Solar System, We discuss asteroids, meteors, meteorites, comets, The Asteroid Belt, The Kuiper Belt, and The Oort Cloud.

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