19 February 2013, 08:11 AM ET
Stars are giant, luminous spheres of plasma. Galaxies consist of stars, stellar remnants, dust, gas, and dark matter, bound together by gravity. Learn more about stars and galaxies.
24 January 2013, 06:26 AM ET invites experts in space exploration, science & technology to provide insightful commentary and informed perspective on news, current events, innovations, big ideas and ongoing research. Expert Voices includes Op-Ed analysis and opinion as well
08 June 2012, 03:09 PM ET
A black hole is a location in space that possesses so much gravity, nothing can escape its pull, even light.
31 May 2012, 12:42 PM ET
Get the latest news for the rare 2012 Venus transit across the sun on June 6. The next one is in 2117!
29 February 2012, 01:19 PM ET
At SpaceKids on, you'll find big questions and answers about everything from the moon to Mars to our Milky Way.
17 February 2012, 07:33 AM ET
It's been 50 years since humanity first launched into space and there's still much more to explore.
29 December 2011, 02:31 PM ET
See the latest news about NASA's Grail moon gravity mission.
11 October 2011, 12:14 PM ET
Each day we highlight a spectacular picture from space. See space exploration photos, astronaut pictures and more in our Image of the Day galleries.
07 October 2011, 02:47 PM ET
The planet Uranus is the seventh planet from the sun and the third largest planet in the solar system. Uranus is a gas giant with the coldest atmosphere in the solar system.
02 September 2011, 06:43 AM ET
See the latest news on Nibiru and 2012.
21 July 2011, 06:18 AM ET
See the latest updates on NASA's last shuttle mission in history, the STS-135 flight of Atlantis.
22 April 2011, 11:19 AM ET
Space shuttle Endeavour ends its career with the 14-day mission of STS-134.
19 April 2011, 05:29 PM ET
The solar system's runt.
19 April 2011, 05:18 PM ET
The eighth planet is an ice giant.
19 April 2011, 01:02 PM ET
The gas giant is the third-largest planet.
23 March 2011, 05:57 PM ET
Learn the latest discoveries about the ringed planet Saturn.
23 March 2011, 05:38 PM ET
Learn the latest discoveries about Jupiter and its many moons and rings.
23 March 2011, 04:59 PM ET
Learn the latest discoveries about Venus.
23 March 2011, 04:29 PM ET
Learn the latest about Mercury, our solar system's smallest planet.
23 March 2011, 03:49 PM ET
Mars is the fourth planet from the sun. See the latest discoveries on the Red Planet.
23 March 2011, 01:02 PM ET
Relive the final voyage of NASA's space shuttle Discovery during the STS-133 mission.