Space
- Planets
Saturn’s Spongy Moon
Close-up views of Saturn's moon Hyperion reveal a strangely cratered surface that looks spongy.
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- Planets
Cousin Earth
Astronomers have found a solid, Earthlike planet just 15 light-years beyond the solar system.
- Planets
Chaos Among the Planets
The screwball travels of four giant planets may have reshaped the early solar system.
- Space
Killers from Outer Space
A newly revised scale rates the risk that an asteroid may crash into Earth and wipe out life as we know it.
- Planets
Solving a Sedna Mystery
Astronomers are learning more about the most-remote object known in the solar system.
- Space
Return to Space
NASA is readying the space shuttle Discovery for its first launch in more than 2 years.
- Space
Super star cluster in the neighborhood
Astronomers have spotted an amazingly compact grouping of stars in the Milky Way.
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