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  • Moulin
    replied
    how many more undetected objects are out there?

    http://www.astronomytrek.com/asteroi...iles-of-earth/

    Leave a comment:


  • Moulin
    replied
    Originally posted by G David Bock View Post
    How NASA plans to protect Earth by knocking asteroids off course

    http://www.msn.com/en-us/news/techno...rse/vi-BBE04r1
    is it worth it, though?
    what's the chances of a large enough asteroid hitting a populated area?--but they can't really test it against the real thing? will it work for sure?

    Leave a comment:


  • G David Bock
    replied
    How NASA plans to protect Earth by knocking asteroids off course

    http://www.msn.com/en-us/news/techno...rse/vi-BBE04r1

    Leave a comment:


  • G David Bock
    replied
    Watch biggest explosion EVER on Moon

    (The Express hypes, but more like biggest ever recorded on "film")
    http://www.express.co.uk/news/scienc...A-video-impact


    Fortunately there and not upon Earth.

    Leave a comment:


  • G David Bock
    replied
    NASA unveils plan to test asteroid defense technique

    DART launch set for October 2022

    EXCERPT:
    CNN) - Humanity could face one less doomsday scenario if NASA has its way.
    On Friday, the space agency announced plans to redirect the course of a small asteroid approaching Earth, as part of the Double Asteroid Redirection Test (DART), according to a NASA press release.
    The release notes that asteroids hit Earth nearly every day, but most are small enough to burn up in the atmosphere.
    But the DART project -- a joint effort between NASA and the John Hopkins Applied Physics Laboratory in Maryland -- is for the asteroids that are too big to break up -- those that could have severe consequences for the Earth if they hit.
    ...
    https://www.clickorlando.com/news/na...ense-technique

    Leave a comment:


  • G David Bock
    replied
    Originally posted by Moulin View Post
    IMO 18,600 is not a near miss, but a close shave !
    12 years? definitely good chance of giving the earth a good whacking
    Agreed!

    Geo-Synchronous Orbit is about 24,000 miles out so this is inside the orbital zone of many communications relay sattelites.

    Leave a comment:


  • Moulin
    replied
    Originally posted by G David Bock View Post
    A Giant Asteroid Will Come Extremely Close To Earth In 2029, And Impact ‘Can’t Be Ruled Out’

    EXCERPT:


    Scientists believe a 40-million-ton asteroid set to fly close to Earth in 12 years may end up colliding with our planet on a future pass.
    The Apophis asteroid will pass within 18,600 miles of Earth on April 13, 2029, which is ridiculously close by space distance standards. Scientists expect the near-miss to disrupt the asteroid’s orbit, making its future path unpredictable.
    This means there’s a small chance Apophis could hit Earth on a future pass. Apophis will pass by the Earth again in 2036.
    “You can find a full table of objects for which the impact probability is not mathematically zero,” Dr. Richard P. Binzel, a planetary science professor at Massachusetts Institute of Technology (MIT) who’s involved in research on Apophis, told The Daily Caller News Foundation. “The table includes Apophis with a probability of 8.9e-6 (less than one chance in 100,000).”
    ...
    http://dailycaller.com/2017/06/26/a-...-be-ruled-out/


    If the path is changed and unpredictable, can we be sure it comes back by in 2036?
    Could return a bit sooner, or later ...
    IMO 18,600 is not a near miss, but a close shave !
    12 years? definitely good chance of giving the earth a good whacking

    Leave a comment:


  • G David Bock
    replied
    Are asteroids humanity's 'greatest challenge'?

    EXCERPT:

    Throughout its 4.5-billion-year history, Earth has been repeatedly pummelled by space rocks that have caused anything from an innocuous splash in the ocean to species annihilation.

    When the next big impact will be, nobody knows.

    But the pressure is on to predict—and intercept—its arrival.

    "Sooner or later we will get... a minor or major impact," Rolf Densing, who heads the European Space Operations Centre (ESOC) in Darmstadt, Germany, told AFP ahead of International Asteroid Day on Friday.

    It may not happen in our lifetime, he said, but "the risk that Earth will get hit in a devastating event one day is very high."

    For now, there is little we can do.

    Read more at: https://phys.org/news/2017-06-astero...atest.html#jCp

    Leave a comment:


  • G David Bock
    replied
    A Giant Asteroid Will Come Extremely Close To Earth In 2029, And Impact ‘Can’t Be Ruled Out’

    EXCERPT:


    Scientists believe a 40-million-ton asteroid set to fly close to Earth in 12 years may end up colliding with our planet on a future pass.
    The Apophis asteroid will pass within 18,600 miles of Earth on April 13, 2029, which is ridiculously close by space distance standards. Scientists expect the near-miss to disrupt the asteroid’s orbit, making its future path unpredictable.
    This means there’s a small chance Apophis could hit Earth on a future pass. Apophis will pass by the Earth again in 2036.
    “You can find a full table of objects for which the impact probability is not mathematically zero,” Dr. Richard P. Binzel, a planetary science professor at Massachusetts Institute of Technology (MIT) who’s involved in research on Apophis, told The Daily Caller News Foundation. “The table includes Apophis with a probability of 8.9e-6 (less than one chance in 100,000).”
    ...
    http://dailycaller.com/2017/06/26/a-...-be-ruled-out/


    If the path is changed and unpredictable, can we be sure it comes back by in 2036?
    Could return a bit sooner, or later ...

    Leave a comment:


  • G David Bock
    replied
    NASA finds 10 'hazardous' asteroids near Earth...

    Unexplained comet activity spike...

    Leave a comment:


  • G David Bock
    replied
    Here's another article on what is a regular "threat" window, the Taurid Meteor Streams (TMS), which are connected with Comet Encke;
    Earth Faces an Increased Risk of Being Hit by an Asteroid, Astronomers Warn

    Large asteroids may be lurking undiscovered within a meteoroid stream whose particles are hitting Earth, and scientists are urging a concentrated search for them.
    ...
    Most of these particles are quite tiny and pose no threat whatsoever, but the Czech astronomers have tracked a new branch of the stream from which particles are intersecting with the planet. The branch includes two asteroids with diameters of between 200 and 300 meters (roughly 650-1000 feet). These asteroids are not themselves on a collision course with Earth, but their identification suggests that there may be other asteroids of this size or larger lurking undiscovered within this stream.

    As such, the astronomers are urging a concentrated search for more Taurid asteroids, to see if any potentially threatening ones exist.
    ...
    https://www.seeker.com/space/astrono...tronomers-warn


    The threat/danger of the TMS was raised about twenty years ago by Richard C. Hoagland in the following article/link. While some of this relates to "conspiracy theory' material of past and questionable concern, the middle part of the article provides interesting text and illustrations on the TMS and possible past historical impact events, such as following excerpt;
    ...
    Leading astronomers of the last half-century like Fred Whipple, Victor Clube, and William Napier have done extraordinary work pointing out that the Taurid stream seems to be the strung out remnants of a mega comet, an object at least several hundred kilometers in diameter which broke up only 20,000 years ago. The stream is thought to be lead by comet Encke, the shortest (3.3 years -- 1/10th 33 ..!) periodic comet known. The stream of debris orbits in an "Earth Crossing" elliptical pattern, a "tube" essentially 30 million kilometers wide. We cross this stream like clockwork twice a year, from June 24th through July 6th, and from November 3rd through November 15th. As you can see, we annually spend some 24 days in the grips of the Taurid's trail. Since the Earth's crossing time for most other meteor streams is just a few hours, volume for volume and mass for mass, the source object of the Taurid stream may be about a million times larger than a "typical" one.

    In pointing out several periods of multiple impact events in the past (one coinciding with the construction of Stonehenge) due to a disturbance or fragmentation in the stream, Clube and Napier discern that there must be several massive "hidden" comets in the stream, dormant comets invisible to our telescopes buried in the dust and debris.

    Whipple, for one, concurred. He pointed out that Encke, some 5 kilometers across, most probably had several dormant and even larger companions. In addition there have so far been two other comets identified in the stream and 13 Earth crossing asteroids.
    ...
    http://enterprisemission.com/oh_my_god.htm

    A recent article also addresses the TMS and some archaeological evidence;

    Stunning archaeological find vindicates renegade civilization historian Graham Hancock, author of “Magicians of the Gods”

    https://newsflashus.com/stunning-arc...s-of-the-gods/

    Leave a comment:


  • Moulin
    replied
    ..interesting subject here
    ..it's hard to believe the power that some of these large ones could have on impact

    We believe anything larger than one to two kilometers (one kilometer is a little more than one-half mile) could have worldwide effects. At 5.4 kilometers in diameter, the largest known potentially hazardous asteroid is Toutatis.

    By comparison, asteroids that populate the main asteroid belt between Mars and Jupiter, and pose no threat to Earth, can be as big as 940 kilometers (about 583 miles) across.
    worldwide effects?
    https://www.nasa.gov/mission_pages/a...fastfacts.html

    Leave a comment:


  • G David Bock
    replied
    Upcoming line-up ...
    http://www.msn.com/en-us/video/wonde...ear/vi-BBBwPTk

    One later at about 35,000 miles out ... that's a bit close.

    Leave a comment:


  • G David Bock
    replied
    Originally posted by OpanaPointer View Post
    atsdavidonthehead:
    DECODING GÖBEKLI TEPE WITH ARCHAEOASTRONOMY: WHAT DOES THE FOX SAY?
    http://maajournal.com/Issues/2017/Vo...017%281%29.pdf

    Volume 17, Issue 1;
    http://maajournal.com/Issues2017a.php

    Last edited by G David Bock; 21 Apr 17, 14:42.

    Leave a comment:


  • OpanaPointer
    replied
    Originally posted by G David Bock View Post
    More like did you actually read the full article and understand it.
    atsdavidonthehead:

    Leave a comment:

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