NASA - National Aeronautics and Space Administration

At a mere 140 years old, supernova remnant G1.9+0.3 is the youngest in the Milky Way galaxy.

NASA's Phoenix Mars Lander is preparing to end its long journey and begin a three-month mission to taste and sniff fistfuls of Martian soil and buried ice.

The cargo aboard the space shuttle Discovery on mission STS-124 already has traveled halfway around Earth, more than 10,000 miles over land and sea. It’s now ready for the culmination of its 23-year j...