NASA's goal of 19 flights before 2010 is doable, with or without a flight this spring, officials say.

Stardust will drop its precious cargo of comet particles in the Utah desert in mid-January.

NASA faces a busy year securing its plan to return to the moon in the face of potentially shifting political winds.

Mars' newest orbiter, set to join the armada in March, will be able to photograph surface features the size of a beach ball.

Scientists hope the increased visits will unlock the secrets of Saturn's largest moon.

Though U.S. technology is far superior, China has an operable craft that can actually go into space.