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Questions tagged [planetary-defense]

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Can objects be deorbited by a satellite using a magnetic field?

Can a magnetic field be made around a satellite for a split second to gain or loose momentum from another satellite or debris with a few passes with a near-miss trajectories on larger debris? Could a ...
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1answer
111 views

How much asteroid can we divert from the Earth?

There are many movies with the Earth being saved by sending a bomb out blow up the asteroid. What realistically could we do to that degree today? Do we have interplanetary missiles? if so how much of ...
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Asteroid Defense

Has Space X thought about landing on an asteroid, and deploying technology that can either redirect or disassemble an incoming asteroid to avoid or lesson the asteroids impact on earth? I read NASA's ...
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906 views

Why is comet deflection so hard (and how does a fusion rocket help)?

I just read an article arguing that we need very fast rockets for the deflection of comets, since we will probably detect them just several months before impact. So we need to hurry in order to pick ...
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3answers
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Could a cloud of dense gas, such as xenon, deflect a hazardous asteroid?

Impactors or explosive missiles have the advantage of not having to match velocity with an Earth-bound asteroid, so they are cheaper and quicker to launch (or so I understand), and detection need not ...
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Would a kinetic impact “cloud” avoid fragmenting an asteroid to be deflected?

A problem with using a traditional kinetic impactor in one piece, like the one used by Deep Impact, to deflect a hazardous NEA, is that its effects depend on the subsurface composition of the asteroid....
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755 views

Extinction asteroid (10-100 km) impact avoidance

With the present "state-of-the-art" of space technology what is possible to do to avoid an Earth impact by rocky bodies 10 km to 100 km in diameter? Is there any international project to develop a ...
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Could an ARM Option B type of mission be used to deflect a hazardous asteroid?

NASA's Asteroid Redirect Mission ARM Option B would have a robotic probe pick up a boulder from the surface of a much larger asteroid, and put that boulder in lunar orbit. Boulders considered could ...