Search found 5 matches
- Sat Dec 24, 2011 1:22 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Eclipsed Moon in the Morning (2011 Dec 24)
- Replies: 14
- Views: 2292
Re: APOD: Eclipsed Moon in the Morning (2011 Dec 24)
This would look better if some sort of contrast filter hadn't been applied to the eclipsed moon. No part of the moon should be darker than the sky around it, since the moon can only be as dark as space. Since the sky is lightening *that*, the same should happen to the moon. As it is, the moon looks ...
- Wed Jan 27, 2010 6:00 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tethys Behind Titan (2010 Jan 27)
- Replies: 11
- Views: 3053
Re: Tethys Behind Titan (2010 Jan 27)
What I see is the apparent brightness of Tethys' day side, overpowering the brightness of Titan's upper atmosphere. Much like images of our moon through tenuous clouds makes it appear in front of them, the upper atmosphere of Titan is not sufficiently thick enough to block or distort Tethys so the ...
- Wed Jan 27, 2010 5:48 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tethys Behind Titan (2010 Jan 27)
- Replies: 11
- Views: 3053
Re: Tethys Behind Titan (2010 Jan 27)
Oh, man, those pictures are *awesome*. And they look exactly as I'd expect, no weirdness at all. Thank you so much, geckzilla. And I think you're right, the resulting image is probably a combo of multiple exposures (with slightly different positions), requiring some photoshoppery. No harm, no foul, ...
- Wed Jan 27, 2010 5:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tethys Behind Titan (2010 Jan 27)
- Replies: 11
- Views: 3053
Re: Tethys Behind Titan (2010 Jan 27)
A quick addendum: I note what appears to be a slight darkening on the lower bright limb of Tethys, where Titan's haze would cross it. That totally makes sense, since Titan's haze would both reflect sunlight and absorb Tethys' transmitted light. This suggests Tethys was hasn't been repositioned for d...
- Wed Jan 27, 2010 4:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tethys Behind Titan (2010 Jan 27)
- Replies: 11
- Views: 3053
Re: Tethys Behind Titan (2010 Jan 27)
I've looked long and hard at these two images, and the leftmost image sure looks like someone's done a crude photoshop job on it. How can the upper layer of Titan's haze become occluded by the shadow edge of distant Tethys? And why does the bright edge of Tethys cut a very artificial-looking notch i...