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 ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

Small fragments of rock can reveal a lot when they’re analyzed with powerful laboratory instruments. New research into tiny ...

Astronomers appear to have found the missing link that traces the water here on Earth and throughout our solar system back billions of years to when it formed in interstellar space! By now, we've ...

An interstellar comet passing through the solar system contains a surprising mix of chemicals, findings that could help researchers learn more about how planets and stars form elsewhere in the galaxy.

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago. Then the planets began to emerge, as the billions of particles of gas ...