Planets

Physics

Planetary paparazzo

NASA satellite snaps historic photographs of Mercury.

Planets

The growing planetary family

At least 1,200 added to list of possible planets beyond the solar system.

Planets

Warm lava on a hot planet

Volcanoes on Venus might be active.

Planets

Faraway planet could support life

A planet 20 light-years away could be the perfect distance from its star.

Planets

Holes in Martian moon mystery

Phobos may be lots of empty space.

Planets

Wrong-way planets do gymnastics

A group of planets that orbit the wrong way may have flipped over their stars.

Planets

Mercury’s magnetic twisters

The planet's strange atmosphere may have a lot to do with the sun.

Planets

Cool as a Jupiter

New-found, far-out planet could be similar to local gas giants.

Planets

One ring around them all

Introducing the solar system's largest known ring around a planet.

Planets

Either Martians or Mars has gas

Martian methane points to possible life on the Red Planet.

Planets

A new look at Saturn’s rings

New information from space missions suggests Saturn's rings may be older and have more mass than scientists thought.

Planets

Explainer: What is a planet?

Over the years, definitions have changed several times.