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Asteroid collider

How to save the world from asteroid impact
 
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Just watched a documentary about how to stop an asteroid on a collision course with Earth. Basically they stated that we don't have a nuclear weapon capable of stopping a 1km diameter asteroid. (1000+ megatons is required) So this is my plan. Choose a suitable asteroid from the belt between Mars and Jupiter. Attach ion drives, rockets, solar sails or whathaveyou, and drive the thing on a collison course with the approaching worldkiller. You wouldn't need a very big one to do the job, a rock about half the size of the apporaching asteroid should be enough to split it in two and save the Earth.

PS. they said that an asteroid has been discovered that will impact Earth in 800 years time, so we'd better get our act together.

simonj, Aug 14 2003

Cosmic airbag could save the planet http://www.newscien...s.jsp?id=ns99992790
New Scientist article. [Detly]

Space-based missiles could save the world http://www.newscien...s.jsp?id=ns99991924
New Scientist article. [Detly]

NEA HAZARD MITIGATION USING THE YARKOVSKY EFFECT http://www.lpi.usra...sc2002/pdf/1223.pdf
J. N. Spitale, Lunar and Planetary Laboratory, Tucson (Painting an asteroid white...) [Detly, Oct 21 2004]

We could just move it to where we want it http://www.halfbake...20calendar_20reform
[Shz, Oct 21 2004]

Collison installation http://www.paulgraham.com/ds.html
// on a collison course // [notexactly, Feb 18 2019, last modified Mar 18 2019]

Hold my beer; Asteroid_20Orbital_20Decay_20Harvesting
I've got this. [pertinax, Feb 18 2019]

[link]






       [sealorator] Because the approaching asteroid would be a long way out, and pretty fast moving. Much easier to access a local asteroid. And you could send multiple rocks just to make sure.
simonj, Aug 14 2003
  

       With 800 years to prepare it may be easier to dig a hole through earth so the asteroid can pass through without doing damage. The material from the hole could be used to make a small backup world where valuable items can be stored, like my bones.
kbecker, Aug 14 2003
  

       New Scientist published an article (or a couple, really) on a forum that was held to discuss such a situation. It had a variety of interesting, but somewhat impractical ideas (including painting one side white to deflect its path). There were also intermittent articles on the subject. See some links. Of course, these aren't the same as your idea, but you might find them interesting nonetheless.
Detly, Aug 14 2003
  

       Sorry for the flood of links, but I found an article on the asteroid I presume you're referring to...
Detly, Aug 14 2003
  

       Yeah that's it, 1950DA
simonj, Aug 14 2003
  

       I particularly like the title.   

       "...and the good news is that we don't have to watch our own Sun explode."
Detly, Aug 14 2003
  

       you don't need to destroy the asteroid, just nudge it out of collision path. the ions alone could do that.
the great unknown, Jun 06 2006
  

       // Attach ion drives, rockets, solar sails or whathaveyou, and drive the thing on a collison course with the approaching worldkiller. //   

       why not attach those drives to the oncoming asteroid and steer it off course?   

       Better yet, park it in orbit and use it for something useful like mining for minerals or an anchor for a space elevator... ugh
MoreCowbell, Jun 06 2006
  

       // why not attach those drives to the oncoming asteroid and steer it off course? //   

       // Because the approaching asteroid would be a long way out, and pretty fast moving. Much easier to access a local asteroid. And you could send multiple rocks just to make sure. //   

       And what's wrong with the links on this idea?
notexactly, Feb 18 2019
  

       Hey, is Bruce Willis available these days? How about Steve Buscemi?
saker, Feb 18 2019
  
      
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