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Originally posted by letthereaderunderstand
reply to post by jfj123
Just how do you think a laser tracking a moving vehicle works?
A vehicle with lines, cuts, & angles, yet the laser pulls the info back in, but Goddard space center can't throw a laser to the surface of the moon without a reflector?
A Retro reflector is a device or surface that reflects light back to its source with a minimum scattering of light.
Astronauts on the Apollo 11, 14, and 15 missions left retro-reflectors on the Moon as part of the Lunar Laser Ranging Experiment.
The ongoing Lunar Laser Ranging Experiment measures the distance between the Earth and the Moon using laser ranging. Lasers on Earth are aimed at retroreflectors previously planted on the Moon and the time delay for the reflected light to return is determined. Since the speed of light is known with very high accuracy, the distance to the moon can be calculated. This distance has been measured with increasing accuracy for more than 35 years.
The experiment was first made possible by a retroreflector array installed on July 21, 1969, by the crew of the Apollo 11. Two more retroreflector arrays left by the Apollo 14 and Apollo 15 missions have contributed to the experiment.
The distance continually changes for a number of reasons, but averages about 384,467 kilometers (238,897 miles).
At the Moon's surface, the beam is only about 6.5 kilometers (four miles) wide and scientists liken the task of aiming the beam to using a rifle to hit a moving dime 3 kilometers (two miles) away. The reflected light is too weak to be seen with the human eye, but under good conditions, one photon will be received every few seconds (they can be identified as originating from the laser because the laser is highly monochromatic). This is one of the most precise distance measurements ever made, and is equivalent in accuracy to determining the distance between Los Angeles and New York to one hundredth of an inch. As of 2002 work is progressing on increasing the accuracy of the Earth-Moon measurements to near millimeter accuracy.
Now you might ask yourself what type of laser is being used?
The Astrophysical Research Consortium at Apache Point, has a laser generator in use with a 3.5-meter telescope that generates a peak power of 1 gigawatt for a short time, but just long enough to fire off a one-inch bullet of light aimed through the telescope at the lunar surface.
Earth's atmosphere distorts the beam so that it disperses . Only one in 30 million of the original photons in the beam actually will hit the retroreflector. By the time the light makes it back to Earth, the beam will have expanded to 9.3 miles in diameter. Of the returning photons, only one in 30 million will hit the telescope on Earth.
Do you hear what you are saying? You don't even address that there is no independent way to verify Nasa claims outside of Nasa/ESA and you are arguing shooting a laser into the dirt?
Does the sun reflect coherently off of the moon? Kids can ping pilots in the eyes with keychain lasers, but Goddard can't get any "coherent reading" with out a reflector that the hubble can't even see? For real? You are a riot....LOL
I'm still laughing.....I can't stop.
Tears...streaming....gut hurting.....wow....thanks, I forget people are so easy to fool....Nobody relies on themselves to see the world and I forget that....you humble me.
Like I said, hehehehe
Rest in Peace Neil
It is not Mr. Armstrong's fault however. That fault lies with those who chose him. Never again should we endow such honor on men of his irk.
Originally posted by Sam60
I don't understand why Neil Armstrong is getting beaten up like this.
Could this thread be closed?
Originally posted by seagull
reply to post by Sam60
To add my voice to Mem's. No. As much as some of these opinions may rankle, and they do. They are opinions, and that is, afterall, what ATS is ultimately all about.