Photons coming from the Moon - Unmanned Spaceflight.com

Photons coming from the Moon

hal_9000 View Member Profile	Jul 16 2006, 02:40 PM Post #1
Member Group: Members Posts: 124 Joined: 23-April 05 Member No.: 358	From http://www.signonsandiego.com/news/science...z1c13laser.html Laser light aimed at reflectors left on lunar surface could pinpoint distance from Earth - and test Einstein's theory By Bruce Lieberman UNION-TRIBUNE STAFF WRITER July 13, 2006 On July 21, 1969, Neil Armstrong and Buzz Aldrin propped an array of reflectors in the lunar soil – one of several science experiments they deployed a day after becoming the first humans to set foot on the moon. A month later, a small group of astronomers bounced a pulse of laser light off the reflectors and caught the return signal with a telescope at Lick Observatory near San Jose, in Northern California. By measuring the time it took for the pulse traveling at the speed of light to return, scientists could determine the distance between the Earth and moon. PDF: http://www.signonsandiego.com/uniontrib/20...mages/quest.pdf

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djellison View Member Profile	Jul 19 2006, 01:05 PM Post #2
Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1	Indeed, how could one tell where the dust came from? It could be micro impact ejecta etc. Doug

Posts in this topic

hal_9000 Photons coming from the Moon Jul 16 2006, 02:40 PM

nprev Hmm...I wonder if we could measure the rate of dus... Jul 19 2006, 01:30 AM

Phil Stooke My understanding is that there has been no detecta... Jul 19 2006, 12:49 PM

djellison Indeed, how could one tell where the dust came fro... Jul 19 2006, 01:05 PM

nprev Good point, Doug, and thanks for pointing out that... Jul 19 2006, 11:52 PM

edstrick The Surveyor observations were made on most missio... Jul 20 2006, 08:57 AM

nprev Thanks, Ed, for the good info. Hmm yet again...So... Jul 21 2006, 12:42 AM

edstrick As I was going to bed last night, I recalled that ... Jul 21 2006, 10:27 AM

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