It happens once or twice
every million years. A comet or asteroid tears through Earth's atmosphere and smashes into
the ground or ocean with enough force to destroy civilization.
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- The good news:
- Scientists will probably spot the
object before it hits us now.
- The bad news:
- Even if we get six months warning,
there's nowhere to hide.
Smaller objects hit the Earth all the time. Most of them
land in oceans or uninhabitated areas, unnoticed. But some make headlines.
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| A small meteorite hit this car
in 1994. |
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| Jupiter after the comet
Shoemaker-Levy 9 collision |
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So what will we do if the unthinkable happens? Is Earth
defenseless against a large comet or asteroid?
Scientists and military planners say with enough warning
we could intercept a cosmic cannonball. Among the defensive manuvers under study ... and
debate:
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"At present no asteroid or comet
is known to be on a collision course with the Earth. The chances of a collision within the
next century with an object 1 km or more in diameter are very small (roughly 1 in ten
thousand), but such a collision is possible and could happen at any time."
Destination:
Earth Destination:
Space
Related sites:

The International Meteor
Organization