Reference Pages
13 April 2012, 06:30 AM ET
Titan is the only moon in the solar system with a thick atmosphere. See more Titan facts here.
10 April 2012, 10:38 AM ET
Pluto, the most famous dwarf planet, lost its planet status in 2006. Learn more about dwarf planets of the solar system here.
03 April 2012, 11:15 AM ET
Learn about the science behind the northern and southern lights.
09 November 2011, 11:17 AM ET
Here's a look at all the Mars missions to date, with those that failed in bold.
26 October 2011, 01:16 PM ET
The icy dwarf planet Eris is nearly exactly the same size as Pluto.
28 June 2011, 01:38 PM ET
Vesta is the second largest asteroid in the solar system.
08 April 2011, 07:00 AM ET
A look at some of the records people have set over the first 50 years of human spaceflight.
04 May 2009, 08:44 AM ET
When stars can't handle their nuclear fuel, they explode in a brilliant burst of light.
03 August 2007, 10:45 AM ET