Timeline for First visible signs of human habitation on the Moon. What could we see from Earth?
Current License: CC BY-SA 4.0
11 events
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| Mar 19, 2021 at 13:52 | comment | added | Justin Thyme the Second | @AlexP From the linked article "A key observing site is the McDonald Observatory in Texas where a 0.7 meter telescope regularly pings reflectors in the Sea of Tranquility (Apollo 11), at Fra Mauro (Apollo 14) and Hadley Rille (Apollo 15), " | |
| Mar 19, 2021 at 13:46 | comment | added | Justin Thyme the Second | @nalply Corrected the link, thank you for the heads up. | |
| Mar 19, 2021 at 13:44 | history | edited | Justin Thyme the Second | CC BY-SA 4.0 |
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| Mar 19, 2021 at 12:35 | comment | added | nalply | The second link (with the text Hubble telescope) is broken. It seems that you accidentally pasted some text instead of the URL. | |
| Mar 19, 2021 at 2:43 | comment | added | AlexP | As far as I know, the way they are using those retroreflectors is to shoot a very powerful laser pulse towards the moon and then measure the time it takes for an ultrasensitive detector to sense the handful of photons which come back. I've never heard of any Earth telescope actually imaging those retroreflectors. You said that this was possible, and I would like a source. | |
| Mar 19, 2021 at 2:34 | comment | added | Justin Thyme the Second | @AlexP Obviously, if astronomers have been using it from Earth, it is visible from telescopes on Earth. The timing is over hours. | |
| Mar 19, 2021 at 2:30 | comment | added | AlexP | The text still says that the Apollo / Lunokhod retroreflectors "can be seen by telescopes if one times it right". I didn't know that, and it seems very surprising. Do you have a source for this statement? | |
| Mar 19, 2021 at 2:24 | comment | added | Justin Thyme the Second | @AlexP You should have waited for the complete post, rather than the initial teaser. | |
| Mar 19, 2021 at 2:23 | history | edited | Justin Thyme the Second | CC BY-SA 4.0 |
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| Mar 19, 2021 at 0:58 | comment | added | AlexP | Do you have any source saying that the Apollo / Lunokhod retroreflectors are visible from Earth? ("Visible" as in "we can take a picture of them", as opposed to "if we illuminate them with a strong laser pulse we can detect a handful of photons reflected back".) | |
| Mar 19, 2021 at 0:51 | history | answered | Justin Thyme the Second | CC BY-SA 4.0 |