Timeline for Why does a blue sky at dusk appear nearly black through a telescope?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 5, 2017 at 19:05 | answer | added | dominecf | timeline score: 0 | |
| Apr 11, 2013 at 9:51 | answer | added | Ernest_SPb | timeline score: 2 | |
| Nov 20, 2012 at 17:18 | vote | accept | David H | ||
| Nov 20, 2012 at 8:30 | comment | added | DilithiumMatrix | @anna, while the sky appears enlarged, the area that light is coming out of (the eye-piece lens) is smaller than the collecting area (the objective). | |
| Nov 20, 2012 at 7:49 | comment | added | David H | @anna v: The link you provided is much appreciated. It seems I wasn't so much lacking an understanding of optics, so much as I was lacking an understanding of telescopes. Cheers | |
| Nov 20, 2012 at 6:14 | comment | added | anna v | An interesting link : sky.velp.info/daystars.php . The videos are before sunset, and the sky is bluish. The effect you see must be as you explain, a small portion of the sky is enlarged by the telescope and the color is diluted. | |
| Nov 20, 2012 at 5:37 | answer | added | DilithiumMatrix | timeline score: 8 | |
| Nov 20, 2012 at 1:20 | comment | added | David H | That was actually my first guess too, but easy enough to rule out with a telescope on hand. When I looked away from the moon the sky was the same shade of dark grey. | |
| Nov 20, 2012 at 0:55 | comment | added | Alfred Centauri | This is just a guess off the top of my head that may very well be shot down: because the moon is so much brighter through the telescope, the surrounding sky, due to a combination of physiological and subjective factors, appears darker. This effect might be a analogous to auditory masking | |
| Nov 19, 2012 at 23:48 | history | asked | David H | CC BY-SA 3.0 |