A large heart-shaped structure non the dwarf planet Pluto has puzzled scientists for years. Now they may have some answers.

"With unprecedented glimpses into these disks surrounding young stars, the birthplaces of planets, JWST helps us uncover how planets form."

Asteroids hitting Earth may have caused "Snowball Earth" periods where ice covered the planet's surface for thousands or millions of years.

When researchers reconstructed lava flows on Mars, they realized the red planet is a lot more active than they previously thought.

Scientists have discovered that, even in "pristine" solar systems, planets exhibit a bit of a tilt.

Venus may have had plate tectonics billions of years ago, a finding that opens the door for the possibility of early life on the planet.

A new theory may explain how gold, platinum, and other precious metals found their way to shallow pockets within Earth’s mantle.

Clouds on Neptune have all but vanished. That's a surprise since it's the farthest planet from the sun and gets only 1/900 of the sunlight we get on Earth.

Venus is about 4.5 billion years old, but it looks a lot younger. A new discovery may explain the secret to its youthful appearance.

Astronomers have been trying to get a closer look at GJ 1214b, an exoplanet 40 light-years away from Earth, for decades. Now they have.