Space
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- Planets
Martian Caves
New images taken by a spacecraft orbiting Mars show what appear to be entrances to caves.
- Space
Unearthing Ancient Astronomy
Researchers discover that ancient Peruvians were tracking the skies 4,000 years ago.
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- Space
Galactic Growth Spurts
A newly discovered galaxy that grew in fits and starts is like no other galaxy known.
- Space
A family in space
Astronomers have discovered a "family" of related objects in a distant region of the solar system.
- Space
Tracking Solar Storms
Electrical storms on the sun can send charged particles all the way to Earth.
- Planets
Defining planethood
Did Pluto deserve to be demoted from the rank of planet in the solar system?
- Space
A dead star’s dusty ring
Astronomers have observed the dusty remains of a planetary system around a dead star.
- Space
Space Camera Glitch
The sharpest, most sensitive camera on the aging Hubble Space Telescope has stopped working.
- Planets
Strange Neptune
From giant storms and icy geysers to tilted orbits and weird spins, Neptune and its moons have many surprising features.
- Planets
A star’s belt of dust and rocks
Astronomers have obtained hints of a dusty asteroid belt around a nearby star.
