Quote:
Originally Posted by White Doors
Actually there is a Nasa Program that tracks these, can't remember the name of it now. And one this big would be relatively easy to spot and would have quite a few years warning simply because of the size of it. It's the smaller one's that are more menacing just because there are so many of them.
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The program is Near Earth Asteroid Tracking (NEAT). It started up in 1995.