Planets
- Planets
The trouble with Pluto
The traditional view of the solar system is out of date. Depending on who you talk to today, the answer to how many planets there are could be eight, 12, or even 208 and counting.
- 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."
- Planets
Mercury unveiled
A new mission to Mercury is revealing surprising, never-before-seen details about the innermost planet.
- Planets
Venus unveiled
A recent mission to Venus has revealed new information about that planet's watery past.
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- Planets
Planet Survivor
Scientists have discovered a planet outside our solar system that survived the rapid growth of its parent star.
- Planets
Two Suns in the Sky
Some planets may orbit double stars, which means that the planets might have double sunrises and double sunsets.
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- Planets
An Earthlike Planet
Astronomers have discovered an Earthlike planet that could have liquid water, and perhaps life, on its surface.
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