[HN Gopher] Is it possible for a lunar eclipse to occur before s... ___________________________________________________________________ Is it possible for a lunar eclipse to occur before sunset? Author : georgecmu Score : 59 points Date : 2023-01-05 19:34 UTC (3 hours ago) (HTM) web link (astronomy.stackexchange.com) (TXT) w3m dump (astronomy.stackexchange.com) | IncRnd wrote: | Yes, a selenelion will happen just before sunset or just after | sunrise when the sun and moon are at opposite points of the | horizon. This is also called a horizontal eclipse and is due to | the atmosphere not the planet. [1] [2] | | [1] https://sciencenotes.org/selenelion-eclipse/ | | [2] https://www.space.com/27338-total-lunar-eclipse-rare- | sunrise... | JEDI-HACKER wrote: | Yes always possible. If you consider the light spectrum is split | during sun set and rise. So you will get more red light spectrum, | during set/rise. You will see more green during night ie Nothern | lights. And obviously mostly blue during the day. | jjtheblunt wrote: | i just realized you explained the red dawn and red dusk in | Arizona, far more scientifically than the urban legend that | it's "pollution from California". | Taniwha wrote: | A lunar eclipse can happen at any time of the day, might only be | visible on the other side of the planet - maybe the question he | meant to ask was "can you see ...." | jojobas wrote: | Every lunar eclipse happens at every possible time of the day, | simultaneously. | supernova87a wrote: | It is possible (atmospheric effects as stated by others/the | article), but not in a useful sense of having something that | looks impressively like a lunar eclipse. | | In other trivia, expect that a solar eclipse will also happen | somewhere on Earth in any month that has a lunar eclipse. | (exactly because of similar alignment issues) | [deleted] | gweinberg wrote: | Isn't that only true the other way around? The earth is bigger | than the moon, so I'd think sometimes you'd get a total lunar | eclipse when there's only a partial corresponding solar | eclipse, and diddly when there's only a partial lunar eclipse. | [deleted] | codetrotter wrote: | [flagged] | mendelab wrote: | Technically correct, but misses the point :) | codetrotter wrote: | [flagged] | codetrotter wrote: | [flagged] | jefftk wrote: | Wikipedia has a picture from 2014: | https://en.wikipedia.org/wiki/File:Lunar_eclipse_at_sunrise_... | | Here's a nice post thinking through how you might actually | observe this: https://photoephemeris.com/articles/the-selenelion- | challenge | yuliyp wrote: | Sunset is kind of a fluid thing. The lunar eclipse on May 15 last | year happened right around sunset as viewed in the SF bay area. A | little way further south or west would have been an even brighter | sky for the eclipse. https://photos.app.goo.gl/pjbefmFcv2THZEQ19 | are a few photos I took of this. The red of the eclipse was | initially almost invisible due to how much light there still was | in the sky, and it only became clearer as the ambient light | diminished. ___________________________________________________________________ (page generated 2023-01-05 23:00 UTC)