Planets
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- Planets
Pluto and the plutons
A new definition would raise the number of planets in the solar system from 9 to 12.
- Planets
Lakes on Titan
Saturn's giant moon Titan appears to be sprinkled with lakes of liquid methane.
- Planets
The Way a Comet Crumbles
Astronomers are getting a close look at a comet that's falling apart as it nears the sun.
- Planets
Xena’s Mysterious Sparkle
Orbiting beyond Pluto, the recently discovered 10th planet reflects a lot of light.
- Planets
Saturn’s Strangely Warm Moon
Saturn's mysterious moon Enceladus may have liquid water close enough to its surface to produce giant geysers.
- Planets
Jupiter’s Second Red Spot
Several huge storms have merged to give Jupiter a second red spot.
- Planets
Saturn’s rings created by collision
A shattered moon may have produced Saturn's dazzling rings.
- Planets
Fiery Dust from an Icy Comet
Dust samples from a comet contain minerals that form only at high temperatures.
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- Planets
Evidence of a Wet Mars
An orbiter provides new details about when and where liquid water existed on Mars.
