Timeline for If we pick any point on the moon (except possibly the poles), is the sun visible for 13.66 days, and then not visible for 13.66 days?
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 24, 2021 at 5:38 | comment | added | CuteKItty_pleaseStopBArking | @jim gmpfh... learn something every day. thx. | |
| Nov 24, 2021 at 4:30 | comment | added | Jim | @cutekitty-pleasestopbarking i'm pretty sure my understanding is correct, as long as the poles don't wobble during a day. any point on the equator of any spherical body will get equal time in the daylight and night. the only exception i can think of is if the pole is pointed directly at the sun, then the equator will always be in the sun. it doesn't matter if the sun is directly overhead at local noon, or the axial tilt. it seems strange, but it is true. | |
| Nov 23, 2021 at 3:20 | comment | added | CuteKItty_pleaseStopBArking | @jim no. any point that is directly under the sun at noon. That would be the equator only if the planetary body had zero axial tilt (or it was equinox day) | |
| Nov 23, 2021 at 2:47 | comment | added | Acccumulation | @HannoverFist The term for when the Earth blocks the Moon from seeing the Sun is "lunar eclipse". They are not very common. | |
| Nov 22, 2021 at 22:27 | comment | added | Jim | as a general rule, doesn't any point on the equator of a sphere always have equal day and night duration? | |
| Nov 22, 2021 at 21:03 | comment | added | Pere | @CuteKItty_pleaseStopBArking - I read all the answer and it is right. However, according to your answer, the answer to "If we pick any point on the moon (except possibly the poles), is the sun visible for 13.66 days, and then not visible for 13.66 days?" is that the sun is not visible for for 13.66 days, and then NOT visible for 13.66 days. In fact, in you comment you are giving more arguments for answering "not". And I agree that my comment is an oversimplification which is actually true only in average, but that just adds reasons to answer not. However, it's nitpicking, I admint. | |
| Nov 22, 2021 at 19:51 | comment | added | SpaceLawyer | This is one of the main reasons the poles are likely to be the most congested (and contested?) regions of the Moon. See also permanently-shadowed regions, ISRU, etc. | |
| Nov 22, 2021 at 17:44 | comment | added | CuteKItty_pleaseStopBArking | @HannoverFist Yes, Yes it does. Read all about it here: en.wikipedia.org/wiki/… ...On average, about 3 hours per year | |
| Nov 22, 2021 at 16:24 | comment | added | Hannover Fist | Doesn't the Earth also block the Sun from the moon for some time during each cycle? Obviously the percent would be different for any particular point. | |
| Nov 22, 2021 at 6:16 | comment | added | CuteKItty_pleaseStopBArking | @pere no, it isn't, except by extreme coincidence. The moon, like the Earth, is a sphere. Day and night duration on a sphere are not exactly the same length unless the sun passes exactly overhead. But then, you seem to have not read anything except the first word. The OP asks if the day/night cycle is really that long. My response is "Yes, the light cycle is about one month.", and I then proceed to correct the total duration, ratio of day and night, and other misconceptions. It's all in the answer, I do not know how you missed it. | |
| Nov 22, 2021 at 4:51 | vote | accept | user4574 | ||
| Nov 21, 2021 at 22:25 | comment | added | Pere | The answer shoud start with "No" instead of "Yes", because any point in the Moon is under sunlight for 29.53/2=14.765, not 13.66 days. | |
| Nov 21, 2021 at 5:28 | history | edited | CuteKItty_pleaseStopBArking | CC BY-SA 4.0 |
added 711 characters in body
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| Nov 21, 2021 at 5:21 | history | answered | CuteKItty_pleaseStopBArking | CC BY-SA 4.0 |