Shuttle Getting an Upgraded Fuel Tank
The space shuttle Discovery has returned to NASA's massive Vehicle Assembly Building to get a new, modified external fuel tank…
Dark Spots on the Moon Show a Turbulent Solar System
Only when the Apollo astronauts finally stepped out onto the surface of the Moon was the mystery of its dark…
Mysterious Spot on Titan Puzzles Astronomers
Cassini has turned up an unusual "hotspot" on Titan that astronomers don't have an explanation for... yet. The 483-km (300-mile)…
Podcast: Amateurs Help Find a Planet
Professional astronomers have got some powerful equipment at their disposal: Hubble, Keck, and Spitzer, just to name a few. But…
Audio: Amateurs Help Find a Planet
Professional astronomers have got some powerful equipment at their disposal: Hubble, Keck, and Spitzer, just to name a few. But…
Saturn Reflects X-Rays from the Sun
Based on new observations from the Chandra X-Ray Observatory, Saturn could act as a mirror to help determine when massive…
Opportunity Still Working Itself Free from the Sand
NASA's Opportunity rover is still working its way free from the sand trap it ran into a few weeks ago.…
A Bend in the Rings
This photograph of Saturn taken by Cassini shows its rings bending down just before they pass behind the planet. This…
Voyager 1 Enters the Heliosheath
NASA's Voyager 1 spacecraft has traveled so far in our Solar System that it's reached the heliosheath. This is an…
Powerful Flare Shook Up Our Understanding of the Sun
One of the most intense bursts of solar radiation in more than 50 years happened in mid-January this year, and…