Planetary scientists have long debated where the material that formed Earth comes from. Despite its location in the inner ...

Add Yahoo as a preferred source to see more of our stories on Google. The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the ...

Planetary scientists led by Paolo Sossi have determined that Earth assembled almost entirely from material originating in the ...

Scientists have unlocked one of the solar system’s many secrets from an unexpected source: a planetarium show opening to the public on Monday. At the American Museum of Natural History last fall, ...