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NASA’s Planetary Radar Tracks Two Large Asteroid Close …
NASA simulates how the U.S. might respond to asteroid threatening Earth ...
Apophis - NASA Science
Collisions could increase chance of 'God of Destruction' asteroid ...
Next Five Asteroid Approaches - NASA Jet Propulsion Laboratory …
'Planet killer' asteroid found hiding in sun's glare may one day hit Earth
LIVE: Newly Detected Asteroid Is Passing Earth Closer Than The …
Two Killer Asteroids Are Flying by Earth, and You May Be Able to …
Mountain-size 'planet killer' asteroid will make a close approach …
Two Massive Asteroids Will Fly Past Earth This Week. Here's What …