Scientists have discovered more than 6,000 planets beyond our solar system. What if some of them aren't planets at all, but ...

At extreme pressures and temperatures, water becomes superionic — a solid that behaves partly like a liquid and conducts ...

Some of the most puzzling worlds in our telescopes’ catalogs may not be worlds at all, but relics from the first instants ...

Discover why the solar system's planets are arranged as they are, shaped by formation conditions and planetary migration.

What was originally thought to be a planet orbiting the Fomalhaut star was probably just the fallout of a wild collision.

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty ...

Jupiter currently shines as a brilliant silvery "star" in the constellation Gemini the Twins, low in the east-northeast sky ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...

The Sun is an incandescent but benevolent dictator. For billions of years, it’s kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it on ...

Our solar system is a smashing success. A new study suggests that from its earliest period — even before the last of its nebular gas had been consumed — Earth’s solar system and its planets looked ...

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since ...

A solar conjunction occurs as Venus' orbit carries it into alignment with the sun and Earth. Venus will align with the sun ...