NASA satellite expected to hit Earth this week  September 18,
2011   It’s the Upper Atmosphere Research Satellite, or UARS —
YOU-arz — and it’s currently tumbling in orbit and succumbing to
Earth’s gravity. It will crash to the surface Friday.  Or maybe
Thursday. Or Saturday.   As of the moment, NASA says the
35-foot-long satellite will crash somewhere between 57 degrees
north latitude and 57 degrees south latitude — a projected crash
zone that covers most of the planet, and particularly the
inhabited parts. In this hemisphere, that includes everyone
living between northern Newfoundland and the frigid ocean beyond
the last point of land in South America.  Polar bears and
Antarctic scientists are safe.  It’s the biggest piece of NASA
space junk to fall to Earth in more than 30 years. It should
create a light show. The satellite will partially burn up during
reentry and, by NASA’s calculation, break into about 100 pieces,
creating fireballs that should be visible even in daytime.
“There are too many variatio