Space
Asteroid-tracking proposal wins $25,000 prize
The Planetary Society, a non-profit group, hopes the prize will spur space agencies to develop plans to protect Earth from potential impacts
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Space
Meteorites: How big is safe?
Features
Space
Largest asteroid to come near Earth for 19 years
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Space
Comet samples are surprisingly asteroid-like
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Space
Risk of Mars impact drops to 1 in 10,000
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Space
Meteor shower’s origin remains a mystery
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Space
Possible Mars impact highlights risk to Earth
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Space
Asteroid may hit Mars in January
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Space
Small asteroids can pack a mighty punch
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Space
Space probe targets third comet after second vanishes
After studying one comet, the Deep Impact spacecraft was set to visit another called Boethin 鈥� but it mysteriously vanished, forcing NASA to target a backup
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Earth
Did a comet kick-start Earth’s plate tectonics?
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Space
Deflected asteroids may keep coming back
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Space
Astronomers defend asteroid warning mix-up
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Space
NASA blasted for ignoring smaller asteroids
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