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REPORT COPYRIGHT VIOLATION IN REPLY
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Message Subject
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WTF !! - ASTEROID Impact With EARTH 02.15.2013 ?? - Is This The End ??
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Poster Handle
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Dr. Astro |
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Post Content
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why doesnt the Earth gravity pull it in?
Quoting: MONSTER Well I could spend weeks trying to teach a course on celestial mechanics, but in short, it's traveling above earth's escape velocity and its trajectory does not bring it close enough to earth to experience atmospheric drag, let alone impact. Earth's gravity will affect its orbit, but it will not "pull it in." is it not so that this close pass could change the orbit in such a way that it hits us next time around? earths gravity pulling the object through the metaphorical keyhole etc etc, next pass go boom? Next pass has already been ruled out as a "boom," the first possible impact isn't till about 2027 and is extremely unlikely. Even all possible future impacts cumulatively this rock has extremely low odds of hitting us, there are much more likely threats out there (comparitively).
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