WASP-121 b is the definition of an "extreme" exoplanet — it's so hot that it rains droplets of liquid iron. Now, astronomers ...

Some exoplanets rain molten iron, others are largely composed of diamond ... Kepler-16 b: The Real-Life Tatooine Science fiction fans have long dreamed of planets with two suns. And Kepler-16 b, ...

Nearly three-fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese ...

Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese ...

"Every new result can reshape our understanding of planets, their habitability, and our place in this universe." ...

We all know Mars is called “The Red Planet,” but have you ever stopped to wonder—why is it red? The classic joke explanation ...

Mars, the fourth planet from the ... NASA rovers have revealed. Mars' outer crust is 6 to 30 miles (10 to 50 km) thick and is composed mainly of iron, magnesium, aluminum, calcium and potassium ...

Its loss from magma suggests that the planet has a deep reservoir of primordial helium, and the new compounds suggest that Earth’s iron-rich core could hold some of that helium. But the team ...