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Impact ~ NEO; Near Earth Objects

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  • G David Bock
    replied
    A more recent addition jumping onto the bandwagon;
    http://www.treasuresintime.org/News.html

    Leave a comment:


  • G David Bock
    replied
    Such may have happend before, in not so distant times;

    Comets and The Bronze Age Collapse
    By Bob Kobres
    . . . and from heaven a great star shall fall on the dread ocean and burn up the deep sea, with Babylon itself and the land of Italy, by reason of which many of the Hebrews perished,
    . . . Be afraid, ye Indians and high-hearted Ethiopians: for when the fiery wheel of the ecliptic(?) . . . and Capricorn . . . and Taurus among the Twins encircles the mid-heaven, when the Virgin ascending and the Sun fastening the girdle round his forehead dominates the whole firmament; there shall be a great conflagration from the sky, falling on the earth;

    ...
    https://craterhunter.wordpress.com/c...-age-collapse/

    OR ...
    Vedic Comet - The Cosmic Tusk
    ...
    A friend of the Tusk sent me a fascinating website, The Meaning of the Vedas, stating the hypothesis of Mr. Ravindra Vasudeo Godbole that the origin of the ancient Vedic oral literature of India and Pakistan was the trauma of repeated bombardments from the Taurid cometary debris stream (so well described by Bill Napier and blogged here on the Tusk). To properly critique the argument, one would have to be Vedic scholar, which Godbole clearly is — and I am not. But from the peanut galley it sure appears to be a well considered proposition.

    From The Meaning of the Vedas:
    ...
    https://cosmictusk.com/vedic-comet/

    AND...
    Earth, Air, Fire, and Water: The Archaeology of Bronze Age ...

    adsabs.harvard.edu › full
    by B Masse - ‎1998 - ‎Cited by 20 - ‎Related articles
    It is my purpose in this paper to explore the likelihood that terrestrial and oceanic impacts by comets, asteroids, and meteorites are largely responsible for the ...
    ....
    An exploding meteor may have wiped out ancient Dead Sea ...
    By Bruce Bower
    November 20, 2018 at 11:00 am

    DENVER — A superheated blast from the skies obliterated cities and farming settlements north of the Dead Sea around 3,700 years ago, preliminary findings suggest.
    Radiocarbon dating and unearthed minerals that instantly crystallized at high temperatures indicate that a massive airburst caused by a meteor that exploded in the atmosphere instantaneously destroyed civilization in a 25-kilometer-wide circular plain called Middle Ghor, said archaeologist Phillip Silvia. The event also pushed a bubbling brine of Dead Sea salts over once-fertile farm land, Silvia and his colleagues suspect.
    ...
    https://www.sciencenews.org/article/...ea-communities


    Meteor Explosion Could Have Taken Out Entire Bronze Age ...


    As for impacts in general;

    Did a Comet Really Kill the Mammoths 12,900 Years Ago?
    ...
    Why did mammoths, mastodons, and other mega-beasts vanish from North America?

    Was it because:

    1) humans killed them;

    2) they couldn't hack the climate after the Ice Age ended; or

    3) an exploding comet ignited continent-wide wildfires, sent hundred-mile-an-hour winds and tornadoes howling across the land, and shattered the North American ice sheet, while also maybe gouging out the Great Lakes?

    Let's talk about option number three.

    The idea that a comet struck Earth 12,900 years ago, at the beginning of a strange interlude of climate cooling called the Younger Dryas was first proposed in 2007. In the bitter scientific debate that has flared sporadically ever since, the latest evidence includes:

    https://www.nationalgeographic.com/n...science/#close

    Comet may have exploded over Canada 12,900 years ago ...

    Ancient stone carvings confirm how comet struck Earth in ...

    List of impact craters on Earth - Wikipedia

    Massive crater under Greenland’s ice points to climate-altering impact in the time of humans
    ...
    What he brought home clinched the case for a grand discovery. Hidden beneath Hiawatha is a 31-kilometer-wide impact crater, big enough to swallow Washington, D.C., Kjær and 21 co-authors report today in a paper in Science Advances. The crater was left when an iron asteroid 1.5 kilometers across slammed into Earth, possibly within the past 100,000 years.

    Though not as cataclysmic as the dinosaur-killing Chicxulub impact, which carved out a 200-kilometer-wide crater in Mexico about 66 million years ago, the Hiawatha impactor, too, may have left an imprint on the planet's history. The timing is still up for debate, but some researchers on the discovery team believe the asteroid struck at a crucial moment: roughly 13,000 years ago, just as the world was thawing from the last ice age. That would mean it crashed into Earth when mammoths and other megafauna were in decline and people were spreading across North America.
    ...
    https://www.sciencemag.org/news/2018...ct-time-humans

    Leave a comment:


  • G David Bock
    replied
    As of 04/22/2014 ...

    Earth Hit By 26 Nuclear-Level Asteroid Impacts Since 2000 - How Frequent Are ‘City-Killer’ Asteroids?
    ...
    A new report released by the B612 Foundation indicated that asteroid impacts, each with the power of a single nuclear explosion, may be more frequent than previously thought. While there have been zero nuclear explosions in recent years, the Nuclear Test Ban Treaty Organization’s (CTBTO) International Monitoring System (IMS) has detected 26 nuclear-level explosions caused by asteroid impacts since 2000.

    Most, but not all, of these asteroid impacts occurred too high in Earth’s atmosphere to cause significant damage to the planet, but scientists are troubled by how these asteroids went undetected before they collided with the planet's atmosphere. According to the B612 Foundation, a private organization dedicated to creating an asteroid prevention and early warning system, an asteroid impact occurred in 2013 over Chelyabinsk, Russia, and although it reached the planet undetected, it caused damage to thousands of buildings in the city.

    Former NASA scientist Ed Lu, CEO and cofounder of the B612 Foundation, wants to launch the Sentinel Space Telescope Mission, a deep-space early warning system that would detect Earth-bound asteroid threats using an infrared telescope.
    ...
    https://www.ibtimes.com/earth-hit-26...eroids-1574946

    Meanwhile, some "loons" think that the USA, or Earth, having a "Space Force" which could have capability to deflect and/or "destroy" such a short notice impactor is a waste of money and effort.

    Leave a comment:


  • G David Bock
    replied
    Human Extinction Almost Certain Due To Impending Asteroid Impact, Scientist Warns

    ...
    A cosmochemist warned that human extinction is almost guaranteed if Earth gets hit by a planet-killer asteroid. The scientist also noted that despite NASA’s plans to protect Earth from asteroids, the chances of a major impact happening are still pretty big.

    In her latest book “Catching Stardust,” cosmochemist Dr. Natalie Starkey briefly explained the true meaning of International Asteroid Day. This is an annual event that commemorates the large explosion caused by a meteor that detonated over a region in Siberia on June 30, 1908.

    For Starkey, International Asteroid Day should remain as a constant reminder of what space rocks can do to the planet and its inhabitants. She also noted that the annual event serves as a warning about how a major asteroid impact can easily wipe out humans on the planet.
    ...
    Similar to what happened to the dinosaurs 66 million years ago, humans are in danger of getting wiped out if an asteroid several miles long hits Earth. Aside from the magnitude of the initial explosion, the wide-scale extinction will also be caused by extreme environmental events that will be triggered by a major asteroid impact.

    Of course, NASA and other space agencies around the globe are doing their best to prevent another extinction-level event from happening. Through satellites and other sophisticated monitoring systems, these agencies are keeping track of asteroids that might collide with Earth in the future.

    So far, the agencies noted that they haven’t detected a major asteroid that has a 100% chance of hitting Earth within the next century.

    Despite the agencies’ assurance, Starkey believes that it is still highly possible for an asteroid to remain undetected in the vastness of space. For the cosmochemist, this kind of asteroid is what the people of Earth should be worried about.

    “There is always the possibility a random object that scientists can’t yet see is lurking out there in the outer Solar System, in an orbit that intersects that of Earth within the next few decades,” she said.

    “The problem is that it is currently impossible for astronomers to track every object in the Solar System, particularly the small and fast-moving ones that are on random orbits,” Starkey added.
    ...
    https://www.ibtimes.com/human-extinc...-warns-2829919

    Leave a comment:


  • G David Bock
    replied
    Originally posted by MarkV View Post
    According to a BBC bulletin this morning two medium sized asteroids are crossing Earth's orbit about now. An 'expert' reassured the public that they weren't big enough to be civilisation killers and would merely wipe out everyone in any continent that was impacted and change the weather for decades - so not that big a deal then . Fortunately they will pass about 3 million miles away so no need to cancel any season tickets etc
    About 11-12 times the distance of the Moon from Earth, so not as close a call as some passages have been.

    Leave a comment:


  • MarkV
    replied
    Originally posted by Snowygerry View Post
    I suspect that by 2036 I may not be around (or non compos mentas) so one is tmpted to adopt the Alfred E Newman slogan "What me worry"

    Leave a comment:


  • Snowygerry
    replied
    This is the one to watch out for iirc…

    https://en.m.wikipedia.org/wiki/99942_Apophis

    99942 Apophis (/əˈpɒfɪs/, previously known by its provisional designation 2004 MN4) is a 370-meter diameter near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a probability of up to 2.7% that it would hit Earth on April 13, 2029. Additional observations provided improved predictions that eliminated the possibility of an impact on Earth or the Moon in 2029. However, until 2006, a possibility remained that during the 2029 close encounter with Earth, Apophis would pass through a gravitational keyhole, a small region no more than about 0.5 mile wide, or 0.8 km[8][9] that would set up a future impact exactly seven years later on April 13, 2036.
    https://en.m.wikipedia.org/wiki/99942_Apophis

    Leave a comment:


  • MarkV
    replied
    According to a BBC bulletin this morning two medium sized asteroids are crossing Earth's orbit about now. An 'expert' reassured the public that they weren't big enough to be civilisation killers and would merely wipe out everyone in any continent that was impacted and change the weather for decades - so not that big a deal then . Fortunately they will pass about 3 million miles away so no need to cancel any season tickets etc

    Leave a comment:


  • G David Bock
    replied
    A “city-killing” asteroid just zipped by Earth. Why didn’t we see it coming?
    ...
    On Thursday, an asteroid called 2019 OK, traveling at almost 15 miles a second, came unusually close to impacting Earth. The asteroid passed by about 43,500 miles away — closer to Earth than our moon is. It was one of the closest known approaches of an asteroid to Earth since we started closely tracking the movements of objects in space.

    If you had binoculars and knew exactly where to look, you could have briefly seen 2019 OK in the sky.

    NASA tracks large asteroids in order to identify any that might be on a threatening trajectory toward Earth. But 2019 OK was first seen a few days ago, and was only definitively identified as an asteroid yesterday — hours before it passed right by us.

    How’d they miss it? Well, while 2019 OK could have done a lot of damage if we’d gotten very unlucky — as Swinburne University astronomer Alan Duffy told the Sydney Morning-Herald, the asteroid would have struck Earth with “over 30 times the energy of the atomic blast at Hiroshima” — it’s not actually all that big. The asteroid is estimated to be “between 187 feet and 427 feet in diameter.” The largest passenger aircraft in service today (the Airbus A380-800) is about 240 feet long, so spotting this asteroid would have been a bit like spotting a single big commercial jet in the vast expanse of space — traveling at 15 miles a second and coming toward us directly from the sun, which makes spotting it more difficult.
    ...
    https://www.msn.com/en-us/news/techn...z&ocid=msnbcrd

    Coming from the direction of the Sun, this might have been a laggard from the Beta Taurids stream;
    https://en.wikipedia.org/wiki/Beta_Taurids
    Could also be a stray from the Geminids;
    https://www.amsmeteors.org/tag/geminids/

    An interesting take on the Taurids from about 20 years ago ...
    http://www.enterprisemission.com/oh_my_god.htm

    Leave a comment:


  • G David Bock
    replied
    Evidence of a Gigantic Impact Crater Found Off Scottish Coast
    ...
    Some 1.2 billion years ago, an asteroid measuring over 1 kilometer (0.6 miles) wide smashed into northwest Scotland. Trouble is, scientists aren’t sure exactly where the meteorite struck, as traces of the crater are long gone. With new research, however, scientists are starting to hone in on the impact zone.

    A study led by Kenneth Amor from the Department of Earth Sciences at Oxford University suggests an asteroid measuring between 1 and 2 kilometers (0.6 to 1.2 miles) wide smashed into Scotland’s Minch Basin around 1.2 billion years ago. The estimated location of this ancient collision is just off the Highlands coast, around 15 to 20 kilometers (9 to 12 miles) west of Enard Bay.

    The crater is no longer visible on the seafloor, having been buried by younger rocks over the course of hundreds of millions of years. Evidence of the ancient impact was detected in the reddish-colored rocks of the Stac Fada deposit on the shores nearby. Analysis of these minerals allowed Amor and his colleagues to triangulate the location of the crater, which they describe in research published today in the Journal of the Geological Society.
    ...
    https://gizmodo.com/evidence-of-a-gi...ish-1835375329

    Leave a comment:


  • G David Bock
    replied
    Reporter, columnist, and war correspondent Gordon Dillow has been writing and researching for over thirty years. In the first half, he discussed why the number one threat to the extinction of the human species is from a huge asteroid hurtling out of the deep cosmos on a collision course with Earth, and what thousands of people around the globe are doing to detect and defend against them. "It's not a question of if we're going to be impacted by a significant asteroid," he said, "it's a question of when. It could be 200 years from now, or it could be next Tuesday." While the asteroid Apophis is predicted to come within 19,000 miles of Earth in 2029, the biggest concern is yet unidentified space rocks on an impact course with us, though larger ones will likely be spotted at least slightly in advance, he noted.

    Last month, there was a Planetary Defense Conference with astronomers and disaster management teams, who play out hypothetical "war games," he reported. In one scenario, with an 800 ft. asteroid on a collision course with Denver, rather than using nuclear weapons to nudge it out of the way, the consensus choice of the conference members was to employ a "kinetic impactor"-- basically, ramming the asteroid with an unmanned spacecraft, in the hopes of slowing down its path so it misses Earth. One of the biggest and best-preserved impact sites is Meteor Crater in Arizona. About 50,000 years ago, an asteroid about half the size of a city block left a crater that's almost a mile wide and several hundred feet deep. Imagine, Dillow remarked, what devastation such a space rock would cause if it was to hit a metropolitan area today.
    ...
    https://www.coasttocoastam.com/show/2019/06/05

    Leave a comment:


  • G David Bock
    replied
    A massive asteroid with its own moon trailing behind will pass by Earth this weekend
    ...
    An asteroid nearly a mile wide with a moon of its own is expected to pass by Earth this weekend, traveling at 48,000 mph. The space rock, known as asteroid 1999 KW4, was discovered 20 years ago and is so large that it is orbited by a moon.

    On Saturday evening, 1999 KW4 will make its closest approach to Earth. It will be visible until May 27. Because it carries a large moon along with it, the asteroid is technically designated as a binary system.

    A binary system is defined as two celestial objects close enough to orbit each other, according to NASA.

    The Las Cumbres Observatory describes 1999 KW4 as "slightly squashed at the poles and with a mountain ridge around the equator, which runs all the way around the asteroid. This ridge gives the primary an appearance similar to a walnut or a spinning top."
    ...
    https://www.cbsnews.com/news/asteroi...ng-earth-nasa/

    Leave a comment:


  • G David Bock
    replied
    Simulated asteroid threat to occur next week

    ...

    NASA, FEMA and other agencies will be responding to the simulated threat of an impending asteroid strike.
    The exercise, which will take place during the International Academy of Astronautics Planetary Defense Conference, will serve as a trial run of a potentially catastrophic asteroid impact scenario.
    ...
    https://www.unexplained-mysteries.co...ccur-next-week

    Leave a comment:


  • G David Bock
    replied
    The Car That Got Smashed by a Meteorite –
    It Went Right Through the Trunk

    Mar 27, 2019
    Ian Harvey
    ...
    https://www.thevintagenews.com/2019/...peekskill-car/

    Leave a comment:


  • G David Bock
    replied
    Amazing satellite imagery shows huge METEOR exploding in Earth's atmosphere

    The video clearly shows the plume and shadow of the meteor, as it passes over the Bering Strait
    ...
    Amazing satellite imagery has captured the moment a huge meteor exploded in the Earth's atmosphere with 10 times the energy of the Hiroshima atomic bomb.

    The meteor explosion occurred in December 2018 , but went largely unnoticed because it blew up over the Bering Sea.
    ...
    https://www.mirror.co.uk/science/ama...-huge-14173925

    Leave a comment:

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