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  • 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

    Comment


    • 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.

      Comment


      • 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

        Comment


        • 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.

          Comment


          • How NASA plans to protect Earth by knocking asteroids off course

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

            Comment


            • 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?

              Comment


              • how many more undetected objects are out there?

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

                Comment


                • 30-metre asteroid skimming past Earth in October will test Nasa's doomsday 'planetary defence system'

                  • Asteroid 2012 TC4 will pass 4,200 miles from Earth on October 12
                  • Nasa is using the flyby to test its asteroid detection and tracking network
                  • As it starts to approach Earth, telescopes will establish its precise trajectory
                  • The observations are expected to help refine knowledge about its orbit


                  Read more: http://www.dailymail.co.uk/sciencete...#ixzz4oTiJLrYN

                  4,200 miles is dang close!
                  Lunar distance averages about 239,000 miles and GEO is about 24,000 miles. This is a dang close shave here.

                  Comment


                  • so it's a detection system only? ''part'' of a defense system?

                    Comment


                    • Originally posted by Moulin View Post
                      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?
                      Would not have to hit a high population area to have significant and negative affect(impact). An ocean impact could set off damaging tsunami, many hardground impacts will send weather altering conditions, etc.

                      Here's the NASA page on Asteriod Redirection Mission;
                      https://www.nasa.gov/mission_pages/a...ive/index.html

                      Here's an example of what happens if not near a high population area;
                      https://en.wikipedia.org/wiki/Tunguska_event

                      Comment


                      • Originally posted by G David Bock View Post
                        Would have to hit a high population area to have significant and negative affect(impact). An ocean impact could set off damaging tsunami, many hardground impacts will send weather altering conditions, etc.

                        Here's the NASA page on Asteriod Redirection Mission;
                        https://www.nasa.gov/mission_pages/a...ive/index.html

                        Here's an example of what happens if not near a high population area;
                        https://en.wikipedia.org/wiki/Tunguska_event
                        the damaging tsunami would have hit ''near'' populated areas
                        75% of Earth is ocean....
                        not a good chance of an asteroid doing ''major'' damage IMO
                        thanks for link....I need and enjoy reading something other than Trump, etc

                        Comment


                        • Originally posted by Moulin View Post
                          the damaging tsunami would have hit ''near'' populated areas
                          75% of Earth is ocean....
                          not a good chance of an asteroid doing ''major'' damage IMO
                          thanks for link....I need and enjoy reading something other than Trump, etc
                          The variable is size of impactor. Anything a mile or larger could have significant effect in regional damage and weather changes.

                          Tsunamis can travel far and many coastlines are populated.

                          The impactor that wiped out the dinos and many other lifeforms 65 million years ago has been gauged at about 3 miles diameter.

                          Comment


                          • Originally posted by G David Bock View Post
                            The variable is size of impactor. Anything a mile or larger could have significant effect in regional damage and weather changes.

                            Tsunamis can travel far and many coastlines are populated.

                            The impactor that wiped out the dinos and many other lifeforms 65 million years ago has been gauged at about 3 miles diameter.
                            great points ...3 miles doesn't seem like much on an earthly scale...very telling
                            ..but I thought perhaps volcanic activity was also a theory of the extinction--along with the impact
                            ...however, what about Shoemaker hitting Jupiter with multiple hits?
                            that would be devastating, yes?
                            Last edited by Moulin; 01 Aug 17, 15:15.

                            Comment


                            • Originally posted by G David Bock View Post
                              30-metre asteroid skimming past Earth in October will test Nasa's doomsday 'planetary defence system'

                              • Asteroid 2012 TC4 will pass 4,200 miles from Earth on October 12
                              • Nasa is using the flyby to test its asteroid detection and tracking network
                              • As it starts to approach Earth, telescopes will establish its precise trajectory
                              • The observations are expected to help refine knowledge about its orbit


                              Read more: http://www.dailymail.co.uk/sciencete...#ixzz4oTiJLrYN

                              4,200 miles is dang close!
                              Lunar distance averages about 239,000 miles and GEO is about 24,000 miles. This is a dang close shave here.
                              Maybe not quite so close;
                              EXCERPT:
                              ...
                              Paris (AFP) - An asteroid the size of a house will shave past Earth at a distance of some 44,000 kilometres (27,300 miles) in October, inside the Moon's orbit, astronomers said Thursday.
                              The space rock will zoom by at an eighth of the distance from the Earth to the Moon -- far enough to just miss our geostationary satellites orbiting at about 36,000 kilometres, according to the European Space Agency (ESA).
                              "It will not hit the Earth," said Detlef Koschny of ESA's "Near Earth Objects" research team. "That's the most important thing to say."
                              The asteroid, dubbed TC4, first flitted past our planet in October 2012 -- then at about double the distance before disappearing. It is about 15-30 metres (49-98 feet) long.
                              ...
                              https://www.yahoo.com/news/asteroid-...155009565.html

                              Comment


                              • I didn't know they had such power being that ''small''
                                Russian 2013 meteor
                                The bulk of the object's energy was absorbed by the atmosphere, with a total kinetic energy before atmospheric impact estimated from infrasound and seismic measurements to be equivalent to the blast yield of a nuclear weapon in the 400–500 kiloton (about 1.4–1.8 PJ) range – 26 to 33 times as much energy as that released from the atomic bomb detonated at Hiroshima.
                                1500 people needed some type of medical aid?
                                https://en.wikipedia.org/wiki/Chelyabinsk_meteor

                                Comment

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