July 14 (UPI) -- The Axiom-4 space crew undocked from the International Space Station on Monday morning as it prepares to ...

Astronomers now think Earth and our Milky Way galaxy might be sitting in a giant, mysterious “cosmic void”—a huge region of ...

Scientists predict up to 100 invisible galaxies may orbit the Milky Way, hiding just beyond our current detection limits.

A surprising discovery at the heart of the Milky Way is forcing scientists to rethink how massive structures called Fermi ...