10 May 2006, 01:06 PM ET
Neptune's largest moon, Triton, was originally a member of a duo orbiting the Sun and was kidnapped in a close encounter with Neptune, a new model suggests.
30 December 2005, 06:47 AM ET
There is plenty to see, and SPACE.com provides an overview of the planets for the coming year.
30 November 2005, 12:40 PM ET
Astronomer have discovered a planet about as massive as Neptune orbiting one of the most common types of stars in the universe.
31 August 2004, 01:00 PM ET
The planets are likely gaseous or
mixtures of ice and rock, but they might be barren
rock worlds like Mercury.