Add Yahoo as a preferred source to see more of our stories on Google. When the solar system began to form, everything was chaos. A slew of rocky material was smashing together in a maelstrom that ...

For decades, scientists have believed that planetary systems typically form with rocky planets close to their star and gas-rich planets farther away. This discovery questions their knowledge.

With this new survey, astronomers have gained a peek inside a stage of exoplanet system formation they have yet to fully ...

Humanity has already flung machines into interstellar space, but sending people is a different problem entirely. The physics ...

NEW YORK — NASA's Hubble Space Telescope got a rare look at the aftermath of two cosmic collisions — and helped scientists solve a decades-old mystery. Many years ago, scientists saw a dense, bright ...

Astronomers have discovered a surprising planetary system that does not follow the usual rules of how planets form. The ...

SETI Institute communications specialist Beth Johnson welcomed Professor Dagomar Degroot, environmental historian at Georgetown University, for a discussion on his new book Ripples on the Cosmic Ocean ...