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Proof we made it to the moon: You can still bounce a laser off it today

 
Zerachiel
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Proof we made it to the moon: You can still bounce a laser off it today
An American flag wasn’t the only thing astronauts left behind on the moon 50 years ago. One of the experiments taken into space on Apollo 11 was called the Lunar Laser Retro-Reflector, and it still works even today (though perhaps not as well as it did), just like it did in a 2010 episode of “The Big Bang Theory.”

“The idea behind it was we needed to accurately measure the distance between the earth and the moon, see if that distance varies, map out its orbit,” explained Todd Jaeger, a lunar laser expert who used to work at NASA, and is now with Heraeus Conamic, a German technology company that made the fused silica reflector mirrors used in the experiment.

When Buzz Aldrin left the moon lander, he laid out the reflector module on the surface that enabled scientists here on Earth to shoot a laser at the moon, and have that light reflected right back them.

“It comes back, I take that round-trip time, divide by two, multiply it times the speed of light, and great I’ve got the distance,” said Jaeger.

The success of the project ultimately helped lay the foundation decades later for GPS and other satellite-based technology that we’re so dependent on today.

“We, of course, had to have the same sort of algorithms, calculations worked in, to figure out how to get these into a sustainable orbit around the earth,” Jaeger said. “They had to work this in to the algorithms and calculations that the processors do on these satellites, otherwise the accuracy would have drifted out in minutes. In fact, where we’re used to them being accurate to a few feet for a civilian system, they’d drift off in accuracy by five miles after a day.”

Originally those reflectors were designed to last about a decade, but they still work today, and with the right equipment you can still pull off the experiment, like they suggested in that episode of “The Big Bang Theory.”

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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547


It’s science, tard
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Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
Is it the SAME person or bot here that aLL say Tard in their responses. I've not seen that word so much AS THIS LAST YEAR. Probably same bloke.
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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547


It’s science, tard
 Quoting: Zerachiel


Right, now go take your 10th booster you worthless dumbfuck
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11/22/2023 03:18 AM
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Re: Proof we made it to the moon: You can still bounce a laser off it today
you can bounce a laser off the moon without a reflector.


so it's not proof at all.
Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
“The experiment needed to be built to survive the challenging environmental conditions found on the surface of the Moon. This includes large temperature variations, cosmic and solar radiation, and lunar dust kicked up by both the arrival and departure of the Apollo Lunar Module.[4] Faller identified that an array of small-diameter retroreflector cubes would perform better thermally than one or more larger cubes of the same mass. This thermal performance was important because fused silica, the likely material for the reflectors, optically distorts with inputs of heat from solar energy.[3] There was a strong desire for the experiment to be able to operate during the lunar day to avoid the loss of data collection opportunities during the daylight half of each lunar month.[5]

The Apollo 11, 12 and 14 instruments consisted of 100 solid fused-silica corner reflectors set within a 45 cm (18 in) square panel.[6] The corner reflectors were produced by PerkinElmer and Boxton-Beel Inc. Design and fabrication of the array package was completed by Arthur D. Little Inc.[6] Each reflector is 3.8 cm (1.5 in) in diameter sitting 1.9 cm (0.75 in) below the panel's top surface and mounted between Teflon rings for greater thermal protection.[5] The panel could be set at a slight incline so that the panel could present a more optimized cross-sectional area.[5] The reflector enables the return of 10 to 100 times more powerful signal when compared with reflecting off the lunar surface.[5] The expected life of the experiment was in excess of 10 years.”

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Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
Is it the SAME person or bot here that aLL say Tard in their responses. I've not seen that word so much AS THIS LAST YEAR. Probably same bloke.
 Quoting: Anonymous Coward 85681220


simplejack
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bigsoutherndog

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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547


yes they put a mirror to reflect a laser shot from earth idiot. flat earth loser. even an episode of big bang theory used it.
bigsoutherndog

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Re: Proof we made it to the moon: You can still bounce a laser off it today
you can bounce a laser off the moon without a reflector.


so it's not proof at all.
 Quoting: Anonymous Coward 72269210


no no you cant
Zerachiel  (OP)

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11/22/2023 03:24 AM
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Re: Proof we made it to the moon: You can still bounce a laser off it today
you can bounce a laser off the moon without a reflector.


so it's not proof at all.
 Quoting: Anonymous Coward 72269210


no no you cant
 Quoting: bigsoutherndog


hesright
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Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547


yes they put a mirror to reflect a laser shot from earth idiot. flat earth loser. even an episode of big bang theory used it.
 Quoting: bigsoutherndog


"HUURRRR I'M A GAY PH4GGGOT WHO WATCHES BIG BANG THEORY. IF IT'S ON BIG BANG THEORY, IT MUST BE TRUE!!! HURRRRRRRRRRRRRRRRRRRR"
Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547


yes they put a mirror to reflect a laser shot from earth idiot. flat earth loser. even an episode of big bang theory used it.
 Quoting: bigsoutherndog


"HUURRRR I'M A GAY PH4GGGOT WHO WATCHES BIG BANG THEORY. IF IT'S ON BIG BANG THEORY, IT MUST BE TRUE!!! HURRRRRRRRRRRRRRRRRRRR"
 Quoting: Anonymous Coward 86257547


h0wrude
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Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
I didn't even know they had lasers back then!...
anonymous kiwi

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Re: Proof we made it to the moon: You can still bounce a laser off it today
impossible to aim the laser that precisely over such a long distance plus the spinning earth

Its a good story but it doesnt pass the smell test

just more disnfo from NASA
mind_messenger

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Re: Proof we made it to the moon: You can still bounce a laser off it today
Absolute bullshit. Maybe we did go to the moon but there is no way in hell that anyone would be able to precisely aim a reflector to reflect a beam of light back to earth from the surface of the moon in the available time they had to do it, with the technology available at the time.

Not buying it. Even the very slightest variation in the the angles involved would cause the reflected beam to miss earth by a wide degree
There is a new world order coming

It's not the one they were expecting
Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
impossible to aim the laser that precisely over such a long distance plus the spinning earth

Its a good story but it doesnt pass the smell test

just more disnfo from NASA
 Quoting: anonymous kiwi


An experiment, begun when Apollo 11 astronauts Neil Armstrong and Buzz Aldrin left a mirror on the lunar surface 40 years ago to allow Earth-based astronomers to fire lasers at it, has been ended by American science chiefs.

The National Science Foundation (NSF) last week wrote to scientists working at the McDonald Laser ranging station at Fort Davis in Texas to tell them the annual $125,000 funding for their research project was going be terminated following a review of its scientific merits.

The decision means that four decades of continuous lunar laser research at the McDonald Observatory, run by the University of Texas at Austin, will be halted by the end of this year. Among the project's unlikely achievements has been the discovery that the moon is moving away from Earth at a rate of two-and-a-half inches a year.

The mirror's existence, and the fact that astronomers can bounce lasers off it and detect the returning beam, has also provided Nasa and other scientists with compelling evidence to refute the claims of moon-landing deniers who claim the Apollo lunar mission were hoaxes filmed in an Earth-based studio.

"It is a bitter-sweet feeling to know this is going to come to end at McDonald," said Peter Shelus, head of the laser ranging project. "We have done a great deal of important work using the moon mirrors but it is clearly time for it to end. However, we are hopeful that this work will be continued at other astronomy centres."

The mirror left by Aldrin and Armstrong after they landed on the Sea of Tranquillity on 21 July 1969, was one of five known as "corner mirrors" or "retro-reflector arrays" that were taken to the moon in the later Sixties and early Seventies. Two other corner mirrors were brought to the moon by astronauts on later manned lunar flights, on the Apollo 14 and the Apollo 15 missions. In addition, a second pair were built by French scientists and flown to the moon by the Soviet Union on their robot Luna probes.

Corner mirrors are important scientific instruments because, when struck precisely by a laser beam, they reflect that beam in a parallel path straight back to the source of the laser.

"Essentially, we measure when that beam goes out and when it comes back," said Shelus. "We know the speed of light, of course, so that timing allows us to calculate the moon's distance with incredible precision."

After these laser measurements were amassed for years, calculations by astronomers at the McDonald Observatory showed that as the moon orbits Earth, it creates a bulge of water that travels round the planet behind it. This bulge - which we experience as tides - exerts a gravitational pull on the moon, slowing it down as it circles Earth at a distance of 240,000 miles.

[link to www.theguardian.com (secure)]
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Re: Proof we made it to the moon: You can still bounce a laser off it today
giorgiostolemywe
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Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
impossible to aim the laser that precisely over such a long distance plus the spinning earth

Its a good story but it doesnt pass the smell test

just more disnfo from NASA
 Quoting: anonymous kiwi


An experiment, begun when Apollo 11 astronauts Neil Armstrong and Buzz Aldrin left a mirror on the lunar surface 40 years ago to allow Earth-based astronomers to fire lasers at it, has been ended by American science chiefs.

The National Science Foundation (NSF) last week wrote to scientists working at the McDonald Laser ranging station at Fort Davis in Texas to tell them the annual $125,000 funding for their research project was going be terminated following a review of its scientific merits.

The decision means that four decades of continuous lunar laser research at the McDonald Observatory, run by the University of Texas at Austin, will be halted by the end of this year. Among the project's unlikely achievements has been the discovery that the moon is moving away from Earth at a rate of two-and-a-half inches a year.

The mirror's existence, and the fact that astronomers can bounce lasers off it and detect the returning beam, has also provided Nasa and other scientists with compelling evidence to refute the claims of moon-landing deniers who claim the Apollo lunar mission were hoaxes filmed in an Earth-based studio.

"It is a bitter-sweet feeling to know this is going to come to end at McDonald," said Peter Shelus, head of the laser ranging project. "We have done a great deal of important work using the moon mirrors but it is clearly time for it to end. However, we are hopeful that this work will be continued at other astronomy centres."

The mirror left by Aldrin and Armstrong after they landed on the Sea of Tranquillity on 21 July 1969, was one of five known as "corner mirrors" or "retro-reflector arrays" that were taken to the moon in the later Sixties and early Seventies. Two other corner mirrors were brought to the moon by astronauts on later manned lunar flights, on the Apollo 14 and the Apollo 15 missions. In addition, a second pair were built by French scientists and flown to the moon by the Soviet Union on their robot Luna probes.

Corner mirrors are important scientific instruments because, when struck precisely by a laser beam, they reflect that beam in a parallel path straight back to the source of the laser.

"Essentially, we measure when that beam goes out and when it comes back," said Shelus. "We know the speed of light, of course, so that timing allows us to calculate the moon's distance with incredible precision."

After these laser measurements were amassed for years, calculations by astronomers at the McDonald Observatory showed that as the moon orbits Earth, it creates a bulge of water that travels round the planet behind it. This bulge - which we experience as tides - exerts a gravitational pull on the moon, slowing it down as it circles Earth at a distance of 240,000 miles.

[link to www.theguardian.com (secure)]
 Quoting: Zerachiel


copy paste tard

fuck off shill
Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
impossible to aim the laser that precisely over such a long distance plus the spinning earth

Its a good story but it doesnt pass the smell test

just more disnfo from NASA
 Quoting: anonymous kiwi


An experiment, begun when Apollo 11 astronauts Neil Armstrong and Buzz Aldrin left a mirror on the lunar surface 40 years ago to allow Earth-based astronomers to fire lasers at it, has been ended by American science chiefs.

The National Science Foundation (NSF) last week wrote to scientists working at the McDonald Laser ranging station at Fort Davis in Texas to tell them the annual $125,000 funding for their research project was going be terminated following a review of its scientific merits.

The decision means that four decades of continuous lunar laser research at the McDonald Observatory, run by the University of Texas at Austin, will be halted by the end of this year. Among the project's unlikely achievements has been the discovery that the moon is moving away from Earth at a rate of two-and-a-half inches a year.

The mirror's existence, and the fact that astronomers can bounce lasers off it and detect the returning beam, has also provided Nasa and other scientists with compelling evidence to refute the claims of moon-landing deniers who claim the Apollo lunar mission were hoaxes filmed in an Earth-based studio.

"It is a bitter-sweet feeling to know this is going to come to end at McDonald," said Peter Shelus, head of the laser ranging project. "We have done a great deal of important work using the moon mirrors but it is clearly time for it to end. However, we are hopeful that this work will be continued at other astronomy centres."

The mirror left by Aldrin and Armstrong after they landed on the Sea of Tranquillity on 21 July 1969, was one of five known as "corner mirrors" or "retro-reflector arrays" that were taken to the moon in the later Sixties and early Seventies. Two other corner mirrors were brought to the moon by astronauts on later manned lunar flights, on the Apollo 14 and the Apollo 15 missions. In addition, a second pair were built by French scientists and flown to the moon by the Soviet Union on their robot Luna probes.

Corner mirrors are important scientific instruments because, when struck precisely by a laser beam, they reflect that beam in a parallel path straight back to the source of the laser.

"Essentially, we measure when that beam goes out and when it comes back," said Shelus. "We know the speed of light, of course, so that timing allows us to calculate the moon's distance with incredible precision."

After these laser measurements were amassed for years, calculations by astronomers at the McDonald Observatory showed that as the moon orbits Earth, it creates a bulge of water that travels round the planet behind it. This bulge - which we experience as tides - exerts a gravitational pull on the moon, slowing it down as it circles Earth at a distance of 240,000 miles.

[link to www.theguardian.com (secure)]
 Quoting: Zerachiel


copy paste tard

fuck off shill
 Quoting: Anonymous Coward 86257547


Are big words too hard for you?
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mind_messenger

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Re: Proof we made it to the moon: You can still bounce a laser off it today
Lets assume two observers shooting a laser at the moon, one in New York and one in Paris, pick two cities on opposite sides of the the globe that can see the moon at the same time, which one is the reflector aimed at? It surely can't be aimed at both being the distances involved which would drastically change the angle of the the reflected beam.

Common sense is not that common anymore
There is a new world order coming

It's not the one they were expecting
Zerachiel  (OP)

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Re: Proof we made it to the moon: You can still bounce a laser off it today
Lets assume two observers shooting a laser at the moon, one in New York and one in Paris, pick two cities on opposite sides of the the globe that can see the moon at the same time, which one is the reflector aimed at? It surely can't be aimed at both being the distances involved which would drastically change the angle of the the reflected beam.

Common sense is not that common anymore
 Quoting: mind_messenger


wtfshat

Um no
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mind_messenger

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Re: Proof we made it to the moon: You can still bounce a laser off it today
How in 1969 from the moons surface would you be able to aim such a reflector in the few minutes of time available to perform such a task? Guess that you you have the angle right?
Maybe use a level to make sure the reflector is square with the moons surface.

There is only one small area of the moons surface which you would be able to set up such a reflector and level it to to the surface of the moon and be assured that a laser from earth would be reflected back to earth consistently, and that landing site is no where near that position
There is a new world order coming

It's not the one they were expecting
Anonymous Coward
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11/22/2023 03:47 AM
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Re: Proof we made it to the moon: You can still bounce a laser off it today
An American flag wasn’t the only thing astronauts left behind on the moon 50 years ago. One of the experiments taken into space on Apollo 11 was called the Lunar Laser Retro-Reflector, and it still works even today (though perhaps not as well as it did), just like it did in a 2010 episode of “The Big Bang Theory.”

“The idea behind it was we needed to accurately measure the distance between the earth and the moon, see if that distance varies, map out its orbit,” explained Todd Jaeger, a lunar laser expert who used to work at NASA, and is now with Heraeus Conamic, a German technology company that made the fused silica reflector mirrors used in the experiment.

When Buzz Aldrin left the moon lander, he laid out the reflector module on the surface that enabled scientists here on Earth to shoot a laser at the moon, and have that light reflected right back them.

“It comes back, I take that round-trip time, divide by two, multiply it times the speed of light, and great I’ve got the distance,” said Jaeger.

The success of the project ultimately helped lay the foundation decades later for GPS and other satellite-based technology that we’re so dependent on today.

“We, of course, had to have the same sort of algorithms, calculations worked in, to figure out how to get these into a sustainable orbit around the earth,” Jaeger said. “They had to work this in to the algorithms and calculations that the processors do on these satellites, otherwise the accuracy would have drifted out in minutes. In fact, where we’re used to them being accurate to a few feet for a civilian system, they’d drift off in accuracy by five miles after a day.”

Originally those reflectors were designed to last about a decade, but they still work today, and with the right equipment you can still pull off the experiment, like they suggested in that episode of “The Big Bang Theory.”

[link to wtop.com (secure)]
 Quoting: Zerachiel


Lol "when Buzz Aldrin" the guy that admitted they didn't go and it was a hoax, lol
bigsoutherndog

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11/22/2023 03:49 AM

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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547


yes they put a mirror to reflect a laser shot from earth idiot. flat earth loser. even an episode of big bang theory used it.
 Quoting: bigsoutherndog


"HUURRRR I'M A GAY PH4GGGOT WHO WATCHES BIG BANG THEORY. IF IT'S ON BIG BANG THEORY, IT MUST BE TRUE!!! HURRRRRRRRRRRRRRRRRRRR"
 Quoting: Anonymous Coward 86257547


Actually I had to watch it because your mother was watching while I banged her little asshole
but glad you admitted you were a gay Ph4gggot...good to know

Last Edited by bigsoutherndog on 11/22/2023 03:51 AM
Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
I didn't even know they had lasers back then!...
 Quoting: Anonymous Coward 79924226


They did. Preceded by the maser. Next time they should inform you and maybe even consider enrolling you into elementary school while they're at it.
Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
retards2
mind_messenger

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Re: Proof we made it to the moon: You can still bounce a laser off it today
Maybe they are getting a reflected beam from their lasers, but that reflected beam is coming from the moon itself, not anything humans have set up to accomplish the task
There is a new world order coming

It's not the one they were expecting
bigsoutherndog

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Re: Proof we made it to the moon: You can still bounce a laser off it today
Two were delivered by Apollo 11 and 14 crews in 1969 and 1971, respectively. They are each made of 100 mirrors that scientists call “corner cubes,” as they are corners of a glass cube; the benefit of these mirrors is that they can reflect light back to any direction it comes from.
Anonymous Coward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
None of you tards even considered the "firmament" is what causes LASERs to reflect, and not the Moon.

This thread is full of stupid useless eaters (esp. the OP NASA shill).

glpaward
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Re: Proof we made it to the moon: You can still bounce a laser off it today
juan star for being a shill

fuck off with your propaganda bullshit
 Quoting: Anonymous Coward 86257547

auto post generated by the prompts proof made and moon?





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