Astronomers mapping interstellar dust in three dimensions have identified a giant spherical void in the Milky Way, roughly ...

Dark matter is so pervasive throughout galaxies that its presence explains the stability and motion of stars in systems such as the Milky Way. For example, current models indicate that our galaxy is ...

An accomplished Caltech astrophysicist with more than four decades of research contributions in galactic astronomy and the study of distant planets was fatally shot in the Antelope Valley.

An accomplished astrophysicist who spent decades studying the structure of the galaxy and distant planets has been shot dead ...

If life exists elsewhere in the universe, researchers at the University of Washington are finding the clues on Earth to help understand where to look for it.

President Trump said he's directing the Pentagon and other federal agencies to identify and release files related to UFOs and extraterrestrial life.

Using the James Webb Space Telescope, astronomers have investigated 70 dusty galaxies at the very edge of the universe that challenge our understanding of cosmic evolution.

How big would a telescope need to be to see Earth’s dinosaurs from 66 million light-years away? Think big—and then think ...