Difference between revisions of "Talk:1371: Brightness"
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: I like that - good point... though, there should be a small sliver of Earth where Polaris will be visible during the "day" and will sink ''slightly'' below the horizon for the "night", so I would think you could even toss that star into the group, right? It's not EXACTLY above the north pole (it's off by almost 1 degree, I believe) [[User:Brettpeirce|Brettpeirce]] ([[User talk:Brettpeirce|talk]]) 15:08, 21 May 2014 (UTC) | : I like that - good point... though, there should be a small sliver of Earth where Polaris will be visible during the "day" and will sink ''slightly'' below the horizon for the "night", so I would think you could even toss that star into the group, right? It's not EXACTLY above the north pole (it's off by almost 1 degree, I believe) [[User:Brettpeirce|Brettpeirce]] ([[User talk:Brettpeirce|talk]]) 15:08, 21 May 2014 (UTC) | ||
Polaris is not visible at all in the southern hemisphere. Someone who lives exactly on the equator would in theory see it rise and set, but it's tough to observe something that's one degree above the horizon. [[User:Jim E|Jim E]] ([[User talk:Jim E|talk]]) 15:45, 21 May 2014 (UTC) | Polaris is not visible at all in the southern hemisphere. Someone who lives exactly on the equator would in theory see it rise and set, but it's tough to observe something that's one degree above the horizon. [[User:Jim E|Jim E]] ([[User talk:Jim E|talk]]) 15:45, 21 May 2014 (UTC) | ||
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| + | Assuming he's talking about exoplanet astronomers on Earth, the title-text would require a double reflection. Something on the day-side of the Earth would have to reflect sunlight to space, and something in space would have to reflect this reflected light back into a telescope on the day-side of the Earth. What could this be? The Moon? During a solar eclipse, or even otherwise? (light reflected off the "dark" PART of the moon (washed out by the light reflected by the illuminated part) [[Special:Contributions/108.162.208.169|108.162.208.169]] 14:27, 23 May 2014 (UTC) | ||
Revision as of 14:27, 23 May 2014
Funny. But of course, while this technique, when applied to the sun, correctly infers the earth, it would also infer a planet around pretty much any star except Polaris; presumably incorrectly in at least some cases. 108.162.212.24 13:39, 21 May 2014 (UTC)
- I like that - good point... though, there should be a small sliver of Earth where Polaris will be visible during the "day" and will sink slightly below the horizon for the "night", so I would think you could even toss that star into the group, right? It's not EXACTLY above the north pole (it's off by almost 1 degree, I believe) Brettpeirce (talk) 15:08, 21 May 2014 (UTC)
Polaris is not visible at all in the southern hemisphere. Someone who lives exactly on the equator would in theory see it rise and set, but it's tough to observe something that's one degree above the horizon. Jim E (talk) 15:45, 21 May 2014 (UTC)
Assuming he's talking about exoplanet astronomers on Earth, the title-text would require a double reflection. Something on the day-side of the Earth would have to reflect sunlight to space, and something in space would have to reflect this reflected light back into a telescope on the day-side of the Earth. What could this be? The Moon? During a solar eclipse, or even otherwise? (light reflected off the "dark" PART of the moon (washed out by the light reflected by the illuminated part) 108.162.208.169 14:27, 23 May 2014 (UTC)
