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Huge asteroid that 'could end human life' defying gravity as it moves towards Earth

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  • Huge asteroid that 'could end human life' defying gravity as it moves towards Earth

    Source: Huge asteroid that 'could end human life' defying gravity as it moves towards Earth, scientists say


    Scientists have moved closer to being able to stop a huge asteroid colliding with the Earth and potentially wiping out human life.

    Researchers at the University of Tennessee have discovered that blowing the space rock up could make the collision worse by causing several devastating impacts.

    Instead, small changes could be made to its surface to disrupt the forces keeping it together and cause it to break up in outer space.

    They were studying asteroid 1950 DA, which first became infamous in 2002 when astronomers estimated it had a one in 300 chance of hitting the planet on 16 March, 2880. However, the odds of a collision were later revised to a more reassuring one in 4,000.

    The asteroid has a diameter of one kilometre and is travelling at nine miles a second relative to the Earth, which it would hit at 38,000 miles per hour.

    The impact would have a force of around 44,800 megatonnes of TNT and cause a huge explosion, tsunamis and change the climate of the globe, devastating human life.

    But with 35 generations to go until its possible arrival, scientists are confident that the disaster can be averted.

    The University of Tennessee researchers said 1950 DA is rotating so quickly it “defies gravity” and is held together by cohesive forces, called van der Waals, never before detected on an asteroid.

    The findings, published in the science journal Nature, could prompt a change in tactics defending our planet.

    Previous research has shown that asteroids are loose piles of rubble held together by gravity and friction but by calculating 1950 DA’s thermal inertia and bulk density, the team detected the action of cohesive forces that stop it breaking up.

    Ben Rozitis, a postdoctoral researcher, said if only gravity were holding it together, the spinning would cause it to fly apart.

    The rotation is so fast that at its equator, 1950 DA effectively experiences negative gravity and if an astronaut were to attempt to stand on the surface, he or she would be thrown off into space.

    The presence of cohesive forces has been predicted in small asteroids but definitive evidence has never been seen before.

    “Following the February 2013 asteroid impact in Chelyabinsk, Russia, there is renewed interest in figuring out how to deal with the potential hazard of an asteroid impact,” Dr Rozitis said.

    “Understanding what holds these asteroids together can inform strategies to guard against future impacts.”

    An estimated 1,500 people were injured when an undetected meteor exploded over the city of Chelyabinsk, releasing more than 30 times the explosive energy of the Hiroshima bomb.

    It ripped through the atmosphere at 19 kilometres per second and was equivalent to between 500,000 and 600,000 tons of TNT, scientists found.

    People directly under the flight of the meteor were knocked off their feet and many others suffered sunburn or eye damage as they looked at the intense fireball.

    A shockwave following the impact knocked out thousands of windows and destroyed parts of buildings, injuring anyone nearby with flying debris.

    Source

    © Copyright Original Source


    Get your affairs in order people. You are all gonna die on 16 March, 2880.
    "Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." ― C.S. Lewis, God in the Dock: Essays on Theology (Making of Modern Theology)

  • #2
    Originally posted by Jesse View Post
    Get your affairs in order people. You are all gonna die on 16 March, 2880.
    Thanks! Now I lay awake at nights worrying about this.
    "Neighbor, how long has it been since you’ve had a big, thick, steaming bowl of Wolf Brand Chili?”

    Comment


    • #3
      Good!

      The world needs a good ol' mass extinction.

      K54

      Comment


      • #4
        Originally posted by Jesse View Post
        Get your affairs in order people. You are all gonna die on 16 March, 2880.
        Maybe.
        Micah 6:8 He has told you, O man, what is good; and what does the LORD require of you but to do justice, and to love kindness, and to walk humbly with your God?

        Comment


        • #5
          You reckon we should stick around to watch?
          sigpic1 Cor 15:34 εκνηψατε δικαιως και μη αμαρτανετε αγνωσιαν γαρ θεου τινες εχουσιν προς εντροπην υμιν λεγω

          Comment


          • #6
            Source: Huge asteroid that 'could end human life' defying gravity as it moves towards Earth, scientists say

            ...
            The University of Tennessee researchers said 1950 DA is rotating so quickly it “defies gravity” and is held together by cohesive forces, called van der Waals, never before detected on an asteroid....

            Source

            © Copyright Original Source



            ???

            Comment


            • #7
              Originally posted by klaus54 View Post
              Source: Huge asteroid that 'could end human life' defying gravity as it moves towards Earth, scientists say

              ...
              The University of Tennessee researchers said 1950 DA is rotating so quickly it “defies gravity” and is held together by cohesive forces, called van der Waals, never before detected on an asteroid....

              Source

              © Copyright Original Source



              ???
              Magic!
              "Neighbor, how long has it been since you’ve had a big, thick, steaming bowl of Wolf Brand Chili?”

              Comment


              • #8
                Originally posted by Cow Poke View Post
                Magic!
                Yep. Either that or 2) Journalistic license from misapprehension or 3) Science Falsely-So-Called.

                K54

                Comment


                • #9
                  Originally posted by techtimes
                  Scientists suggest that asteroids are usually made of loose masses of rubble, which are held together by friction and gravity. The researchers say that the 1950 DA is spinning so fast that it is defying the laws of friction and gravity. The scientists also examined the thermal images as well as the orbital drift of the asteroid to find its bulk density and thermal inertia.

                  "We found that 1950 DA is rotating faster than the breakup limit for its density," says Ben Rozitis, an astronomer at the University of Tennessee at Knoxville. "So if just gravity were holding this rubble pile together, as is generally assumed, it would fly apart. Therefore, interparticle cohesive forces must be holding it together."
                  Interparticle Cohesive Forces makes a fascinating read.
                  sigpic1 Cor 15:34 εκνηψατε δικαιως και μη αμαρτανετε αγνωσιαν γαρ θεου τινες εχουσιν προς εντροπην υμιν λεγω

                  Comment


                  • #10
                    Originally posted by tabibito View Post
                    Interparticle Cohesive Forces makes a fascinating read.
                    This is one of the proofs that the theory of Intelligent Falling is a better description of aspects of nature than are Newton's and Einstein's theories of gravity.

                    Comment


                    • #11
                      The thing must be made of nano-scale particles.

                      Doesn't scare me...

                      K54

                      Comment


                      • #12
                        Originally posted by Cow Poke View Post
                        Thanks! Now I lay awake at nights worrying about this.
                        We should probably be a little worried about it though, since it could potentially destroy Earth.....or rather, it has a 1 in 4000 chance to hit Earth....okay, maybe we shouldn't be that worried about it, but still.
                        Better to illuminate than merely to shine, to deliver to others contemplated truths than merely to contemplate.

                        -Thomas Aquinas

                        I love to travel, But hate to arrive.

                        -Hernando Cortez

                        What is the good of experience if you do not reflect?

                        -Frederick 2, Holy Roman Emperor

                        Comment


                        • #13
                          I never understood the idea that blowing up an asteroid would cause more damage because it would break up. Presumably it would break up into much smaller pieces that would mostly burn up in the atmosphere, instead of one giant rock that detonates like a huge nuclear bomb.

                          Comment


                          • #14
                            Originally posted by Sparko View Post
                            I never understood the idea that blowing up an asteroid would cause more damage because it would break up. Presumably it would break up into much smaller pieces that would mostly burn up in the atmosphere, instead of one giant rock that detonates like a huge nuclear bomb.
                            Consider why the military employ(ed) shrapnel instead of solid shells, cluster bombs instead of single bombs, and grapeshot rather than cannonballs.

                            Roy
                            Jorge: Functional Complex Information is INFORMATION that is complex and functional.

                            mikewhitney: What if the speed of light changed when light is passing through water? ... I have 3 semesters of college Physics.

                            Mountain Man: First of all, the Bible is a fixed document.
                            Mountain Man: … this is how liberals argue these days, with labels instead of ideas.

                            Comment


                            • #15
                              Originally posted by Roy View Post
                              Consider why the military employ(ed) shrapnel instead of solid shells, cluster bombs instead of single bombs, and grapeshot rather than cannonballs.

                              Roy
                              Yeah but would you rather be hit by some shrapnel or a nuclear bomb that could destroy all life on the planet?

                              I would also think that smaller pieces would have a much greater chance of just burning up in the atmosphere, like most meteors do.

                              Comment

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