Timeline for What causes this arc in the night sky where the background is brighter on one side than the other?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Jun 18, 2020 at 8:25 | history | edited | CommunityBot |
Commonmark migration
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| Mar 17, 2020 at 23:47 | vote | accept | uhoh | ||
| Mar 14, 2020 at 17:37 | answer | added | JohnHoltz | timeline score: 4 | |
| Mar 14, 2020 at 17:10 | comment | added | Keith McClary | This is from the "Fulldome" (First of 4 pages.) I don't see a shadow in any other images. | |
| Mar 14, 2020 at 16:35 | comment | added | uhoh | @KeithMcClary okay so its not a shadow of the Zodiacal light proper, but it could be artificially shadowed to illustrate where artificial satellites in LEO will go into Earth's shadow. Since they've gone and added those glowing blue rings and annotations for elevation and marked the satellites, maybe this is artificial too. I'll be surprised if it's a real shadow, but if it is it will be quite a pleasant one! | |
| Mar 14, 2020 at 16:31 | comment | added | Keith McClary | It says on the ESO page: "the shadow of the Earth, represented by the dark area on the left of the image". | |
| Mar 14, 2020 at 16:15 | comment | added | uhoh | @KeithMcClary that's a really cool thought, but I think that the Zodiacal light comes from particles in orbit around the Sun mostly quite far from Earth. They orbit in the ecliptic like everything else, thus the name, and so the light is fairly well constrained to a band near the ecliptic and not too far from the Sun, whereas this seems to be everywhere. See 1, 2, and of course 3 :-) | |
| Mar 14, 2020 at 15:04 | comment | added | Keith McClary | Could it be that we don't see the Zodiacal light from the Earth's shadow? | |
| Mar 14, 2020 at 9:57 | comment | added | Christoph | I would assume it is an effect of the camera system. For example some shadowing effect of the moonlight since the moon is directly opposed to the arc | |
| Mar 14, 2020 at 6:00 | comment | added | uhoh | companion question in Astronomy: Which kinds of astronomical observations most need to avoid the Moon being up? | |
| Mar 14, 2020 at 5:19 | history | asked | uhoh | CC BY-SA 4.0 |