[Laser] NASA finds 40 year-old Soviet Laser Reflector on the Moon
bernies at netaxs.com
bernies at netaxs.com
Mon Apr 26 21:38:25 EDT 2010
The Russians probably knew where their reflector was all this time.
They landed robots on the mood before the USA got there, looked
around, and decided the moon wasn't worth spending a lot more money on.
-Ed
http://news.sciencemag.org/sciencenow/2010/04/scienceshot-decades-old-soviet-r.html
It?s gotta be around here somewhere! No one had seen a laser reflector
that Soviet scientists had left on the moon almost 40 years ago,
despite years of searching. Turns out searchers had been looking
kilometers in the wrong direction. On 22 April, a team of physicists
finally saw an incredibly faint flash from the reflector, which was
ferried across the lunar surface by the Lunokhod 1 rover (inset). The
find comes thanks to NASA?s Lunar Reconnaissance Orbiter, which last
month imaged a large area where the rover was reported to have been
left. Then the researchers, led by Tom Murphy of the University of
California, San Diego, could search one football-field-size area at a
time until they got a reflection. Using their laser on the 3.5-meter
telescope at the Apache Point Observatory in New Mexico like a radar,
they immediately measured the distance from Earth to the reflector to
within a centimeter. Now the team can eventually pin down the changing
shape of the lunar orbit to the millimeter to help test Einstein?s
theory of general relativity.
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