Countdowns
08 March 2013, 05:20 PM ET
The shootdown of the spy satellite USA-193 sparked talk about the graveyard of outer space, which is crowded with some 17,000 spent rocket stages, dead or dying satellites and countless crumbs of human-made orbital flotsam. An average of one object has re
08 March 2013, 03:42 PM ET
Learn about the huge new radio observatory opening high in the Chilean desert.
03 March 2013, 10:00 AM ET
What was your favorite space news story of the last week?
24 February 2013, 07:59 AM ET
What was your favorite space news story of the last week?
18 February 2013, 12:00 PM ET
Here are five incredible fireballs caught on video:
18 February 2013, 07:00 AM ET
A brief look at how each American president helped shape and steer American activities in space.
17 February 2013, 11:05 AM ET
What was your favorite space news story of the last week?
10 February 2013, 08:09 AM ET
What was your favorite space news story of the last week?
05 February 2013, 11:45 AM ET
For as long as humanity has gazed up at the heavens, astronomers have sought to explain the cosmos.
02 February 2013, 01:22 AM ET
What was your favorite space news story of the last week?
29 January 2013, 02:40 PM ET
From frogs and turtles to monkeys, chimps and rabbits, the animal kingdom has seen its fair share of space.
26 January 2013, 06:59 PM ET
What was your favorite space news story of the last week?
23 January 2013, 05:35 PM ET
The Top 10 results from NASA's long-lived Red Planet explorers.
20 January 2013, 08:55 AM ET
What was your favorite space news story of the last week?
13 January 2013, 10:00 AM ET
What was your favorite space news story of the last week?
11 January 2013, 10:34 PM ET
Don't miss these highlights from the "Super Bowl of Astronomy" in January 2013.
06 January 2013, 10:00 AM ET
What was your favorite space news story of the last week?
02 January 2013, 01:02 PM ET
Earth has been sending probes to Mars for decades, but some missions stand above the rest.
30 December 2012, 10:11 AM ET
What was your favorite space news story of the last week?
22 December 2012, 07:00 AM ET
What was your favorite space news story of the last week?
15 December 2012, 07:00 AM ET
What was your favorite space news story of the last week?
08 December 2012, 07:00 AM ET
What was your favorite space news story of the last week?
02 December 2012, 09:00 AM ET
What was your favorite space news story of the last week?
01 December 2012, 02:54 PM ET
Here are our favorite space-themed comic characters.
30 November 2012, 07:00 AM ET
The European Southern Observatory's observations in the last five decades altered our ideas of how the universe is put together.
29 November 2012, 05:50 PM ET
Mercury is the closest planet to the sun, yet still has shadowy secrets.
25 November 2012, 07:55 AM ET
What was your favorite space news story of the last week?
18 November 2012, 07:57 AM ET
What was your favorite space news story of the last week?
18 November 2012, 05:14 AM ET
Mars' two faces, its mysterious methane, and the question of water top the list.
11 November 2012, 08:00 AM ET
What was your favorite space news story of the last week?
03 November 2012, 08:00 AM ET
What was your favorite space news story of the last week?
27 October 2012, 04:52 PM ET
What was your favorite space news story of the last week?