4,700 Asteroids Want To Kill You
There are now 4,700 asteroids out there — plus or minus 1,500 – that are considered Potentially Hazardous Asteroids (PHAs). This is the latest and best assessment yet of our solar system’s population of Near Earth Objects that have the potential to make close Earth approaches. The new results come from data obtained from the asteroid-hunting portion of the now-hibernating WISE mission, called NEOWISE.
And no, these asteroids don’t really want to harm you, but they might. “Potentially Hazardous” does not mean an asteroid will impact the Earth; it only means there is a possibility for such a threat. But only by monitoring these PHAs and updating their orbits with new observations can astronomers better predict the close-approach statistics and their Earth-impact threat. So let’s keep looking.
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© nancy for Universe Today, 2012. | Permalink | No comment |
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