Timeline for How is this picture of the moon possible?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Feb 28, 2022 at 8:31 | comment | added | Thomas | @Ruslan We are not talking about pointing exactly in the direction of the sun, only pointing approximately in its direction or approximately opposite, It should do the former, but if this were a sunset it would be the latter, which is impossible, | |
| Feb 27, 2022 at 16:25 | comment | added | Ruslan | @Thomas I think David means this effect. The Moon's lit side only points "correctly" to the sun when lunar phase is 50%, so that it "looks" exactly to the side. | |
| Feb 27, 2022 at 10:41 | comment | added | David Hammen | @Thomas That the crescent moon always points to the right at sunset in the Northern Hemisphere is incorrect. The Moon's orbit is inclined with respect to the ecliptic by 5 degrees. | |
| Feb 27, 2022 at 10:17 | comment | added | Thomas | @DavidHammen There is no odd projective geometry effect visibile here. The crescent points in a direction below the horizon as you would intuitively expect it. But if this is a sunset photo taken in the northern hemisphere, the crescent must point towards the right, not the left. | |
| Feb 27, 2022 at 9:50 | comment | added | David Hammen | @Thomas The only time one can see that thin of a crescent Moon is very near sunrise or sunset. What I was disputing was the line toward the Sun. That that line doesn't always work is something flat earthers love to use as "evidence" in favor of their nonsense. It is evidence -- evidence of 3D projective geometry. | |
| Feb 27, 2022 at 9:39 | comment | added | Thomas | @DavidHammen Your very reference proves that, with the illuminated side of the crescent pointing to the left, the photo could only have been taken at sunset in the southern hemisphere (which the author denies though). Otherwise, it must have been taken at sunrise or the photo has been flipped around. | |
| Feb 27, 2022 at 0:40 | comment | added | uhoh | @DavidHammen you know darn well that in this situation it's very close. I've updated and added the U Penn paper, it's a beauty! | |
| Feb 27, 2022 at 0:38 | history | edited | uhoh | CC BY-SA 4.0 |
added 943 characters in body
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| Feb 26, 2022 at 21:45 | comment | added | David Hammen | Reference: seas.upenn.edu/~amyers/MoonPaperOnline.pdf . See figures 10 & 11. | |
| Feb 26, 2022 at 21:35 | comment | added | David Hammen | -1. The shadow of the Moon does necessarily not point toward the Sun as seen from the Earth. I'll add a reference shortly. | |
| Feb 26, 2022 at 17:29 | history | answered | uhoh | CC BY-SA 4.0 |