Space
- Space
The solar system’s biggest junkyard
The science of tracking millions of pieces of garbage that orbit Earth is tricky and essential.
- Planets
The two faces of Mars
A single impact might explain why the Red Planet’s surface looks smoother in the north and rugged and rocky in the south.
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- Planets
Pluto, plutoid: What’s in a name?
In 2006, an international organization changed the classification of Pluto from planet to "dwarf planet."
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- Space
Ready, set, supernova
For the first time, scientists have caught a star in the act of exploding.
- Planets
Mercury unveiled
A new mission to Mercury is revealing surprising, never-before-seen details about the innermost planet.
- Space
A whole lot of nothing
Scientists have discovered a huge expanse of nothingness in outer space.
- Space
Average galaxies
Small, faint, and sluggish, a newly discovered collection of galaxies is helping explain how larger galaxies came to be.
- Space
Light night, dark stars
Light pollution causes problems for astronomers, migrating animals, and stargazers.
- Planets
Venus unveiled
A recent mission to Venus has revealed new information about that planet's watery past.
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