Thomas Mulligan explains how the Hubble Space Telescope helped establish the universe’s age at 13.8 billion years.

Dr. Caitlin Casey, an observational astronomer, has recently joined the physics department at UC Santa Barbara. She co-leads the C.O.S.M.O.S. collaboration — a project distinguished by its deep ...

The Hubble Space Telescope has caputured new imagery of 9.5 light-years tall portion the Eagle Nebula, located 7000 ...

This unprecedented view of the Bullet Cluster provided by the James Webb Space Telescope and the Chandra X-ray Observatory ...