Search found 10 matches
- Wed Oct 31, 2007 3:53 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: How do Martian craters survive? (APOD 22 Oct 2007)
- Replies: 2
- Views: 1873
Re: How do Martian craters survive?
Something has always puzzled me about Martian craters. Given that they are very old, and that there is so much dust/soil all over the place, why aren't the craters filled to the rim? Clearly, it's because the volume of dust on Mars isn't sufficient to fill all of the craters. And I'm not at all sur...
- Fri Sep 07, 2007 1:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Lunar Eclipse (APOD 30 August 2007)
- Replies: 19
- Views: 7495
- Mon Oct 03, 2005 3:00 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD Oct.03, 2005 Hyperion
- Replies: 44
- Views: 14949
Re: Hyperion
It looks like a spent comet nucleus that was captured by Saturn. That would explain its chaotic orbit and dessicated appearance. And especially when they talk about the extremely low density. Hyperion "has a density so low that it might house a vast system of caverns inside." I'm reminded...
- Fri Aug 26, 2005 6:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Relationship of indentations and age of object.
- Replies: 2
- Views: 2748
Re: Relationship of indentations and age of object.
My question is whether scientists can tell how old an object is from looking at it and inspecting the number of "hits". Is this an emperical judgement or is it an experienced guess? I think its fairly obvious that if you start with an uncratered surface and objects hit it now and again, t...
- Tue Feb 08, 2005 2:02 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Which satellite is this?
- Replies: 193
- Views: 197382
- Mon Feb 07, 2005 9:32 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 521776
- Mon Jan 24, 2005 2:54 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD January 24
- Replies: 2
- Views: 4131
APOD January 24
What did they mean by this "Both the riverbed and lakebed were thought to be dry at the time the image was taken but contained a flowing liquid - likely methane - in the recent past."? I followed the link but it didn't seem to mention anything like this. Is the prevailing view that the pro...
- Mon Jan 24, 2005 2:49 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Light on distant bodies
- Replies: 14
- Views: 8414
They don't use color cameras, they take multiple photos from the same camera with different filters and superimpose the layers with color correction to create the colored image. Not on this probe they didn't. The original poster was right. They took a greyscale image and applied a single color to i...
- Tue Jan 18, 2005 8:55 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: how about some early interpretations of the hyugens pictures
- Replies: 2
- Views: 3576
Panda's Thumb posted a discussion about some of the early opinions on the findings. The dark stuff appears to be some kind of spongy substance with a crusty surface and not a liquid ocean.
http://www.pandasthumb.org/pt-archives/000747.html
http://www.pandasthumb.org/pt-archives/000747.html
- Mon Jan 10, 2005 8:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 521776
To Victor, You make a good point about the orange blob being enclosed in a 8x8 square, which I think is puzzling. But the feature I've enclosed in the orange rectangle covers the corners of two 8x8 squares with an identical color, and is about the same color as the square where the orange blob is. ...