Sci-fi flicks that star Earth-killing space rocks, such as the 1998 movie "Armageddon" or "Deep Impact," might be Hollywood fantasy, but according to astronomers, those silver-screen scenarios could become reality.
Given that there are "potentially hazardous asteroids" NASA has mapped out, scientists are continuing to scan skies just in case. In fact, NASA announced a new "grand challenge" in June to find all dangerous space rocks as well as a way to stop them from destroying Earth.
How exactly do you stop an asteroid in its tracks? I reached out to Lindley Johnson, program executive for the Near-Earth Object Program Office at NASA headquarters in Washington D.C., for the answer:
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See Also:
Newfound Asteroid (2013 NE19) Will Cruise Past Earth Tonight (July 22) | VIDEO
VIDEO | City Block-Size Asteroid Zips by Earth as Scientists Watch
NASA Maps Dangerous Asteroids That May Threaten Earth
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