Topic: Charles Choi
Here's a by-the-numbers look at the Phoenix cluster, which researchers say could yield key insights into how galaxies and colossal clusters evolve:
A new study of the far side of the moon suggests that the Earth once had a tiny second moon, which collided with the bigger one.
08/03/2011 03:15 pm
Trojan asteroid: NASA has discovered that Earth has an asteroid companion traveling just ahead of our planet as it orbits the sun. This so-called Trojan asteroid could serve as a stepping stone to celestial objects farther afield.
07/28/2011 04:23 pm
Cracker-size satellites are to launch with the Space Shuttle Endeavour, advancing efforts to populate the Earth's orbit with tiny 'space-chips.'
04/29/2011 04:52 pm