Space
- Planets
Out-of-this-world atmospheres
Light from a distant, giant world offers clues to the gases in its atmosphere.
- Space
Martian microbes, maybe
Billions of years ago, Mars could have been teeming with very small Martians.
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- Space
Where cosmic rays are born
New evidence links origin of these very energetic particles to massive explosions of distant stars.
- Planets
Home on the moon
Astronomers say rocky moons orbiting distant planets might support alien life.
- Planets
Ice on Mercury
MESSENGER spacecraft provides evidence for frozen water on planet closest to sun.
- Planets
A diamond planet?
Distant, carbon-rich world could contain one-third its weight in gems that are relatively rare on Earth.
- Space
Twinkle, twinkle oldest stars
Astronomers find traces of ancient light in the activity of bright, distant galaxies.
- Planets
New planetary neighbor
Nearest star system has a world that's Earthly in size, but too hot for human visitors.
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- Space
The first moon walker
Forty-five years ago, an American astronaut climbed down the ladder of his lunar landing module — the Eagle — and became the first human to touch the moon’s surface.
