LIGO, Virgo, and KAGRA celebrate anniversary, announce verification of Stephen Hawking's Black Hole Area Theorem.

For the first time, astronomers have used a tool called polarimetry to measure cloud patterns on a brown dwarf.

Everything from the latest virtual reality experiences in space to how to engage the public was discussed at a space visualization conference.

After being alerted to a gravitational-wave event by LIGO and its European counterpart Virgo, thousands of scientists across the globe looked at a patch of sky and saw the aftermath of a neutron star collision, marking the first time such an event has been observed with both gravitational-wave and conventional astronomy.

Caltech space artists Robert Hurt and Tim Pyle help scientists imagine the exotic landscapes of other worlds.

Caltech and JPL scientists and the cast, crew, and producers of the popular Syfy series The Expanse teamed up at Caltech for a panel discussion of the science behind the show,

Caltech astronomers have taken unprecedented images of the intergalactic medium (IGM)—the diffuse gas that connects galaxies throughout the universe—with the Cosmic Web Imager.