Search found 3 matches
- Fri Mar 26, 2010 6:39 pm
- Forum: The Communications Center: Breaking Science News
- Topic: ESO: Why distant galaxy surveys miss 90% of targets
- Replies: 2
- Views: 243
Cosmos has billions more stars than thought?
The journal Nature, yesterday, published online an article about an effort to empirically test what fraction of Lyman-alpha photons actually "escape" absorption to the point of being detectable from Earth: http://www.nature.com/nature/journal/v464/n7288/full/nature08881.html Nature's websi...
- Fri Mar 26, 2010 7:07 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Phobos from Mars Express (2010 Mar 17)
- Replies: 53
- Views: 23663
Re: APOD: Phobos from Mars Express (2010 Mar 17)
So, from that degree of porosity, and the statement (at the link jacklap cited) that "these results [new values for gravitation and density] are inconsistent with the proposition that Phobos is a captured asteroid", may I take it that experts (at least, at the ESA) are also leaning toward ...
- Thu Mar 25, 2010 10:14 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Phobos from Mars Express (2010 Mar 17)
- Replies: 53
- Views: 23663
Re: APOD: Phobos from Mars Express (2010 Mar 17)
It seems like everyone's forgotten the question originally posed in this entry: Why is this small object orbiting Mars? The similarity to C-type asteroids was pointed out, along with the difficulty that would be inherent in gravitationally capturing such asteroids, circularizing their orbits, etc. F...