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 ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

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, ...

One thing that seems certain to unite the world's people beyond language barriers, political differences, is space ...

New observations of interstellar comet 3I/ATLAS show high levels of deuterated water, suggesting it formed in a colder star ...