than 2.2 billion light-years away, for more than 13 hours. The gravity of the cluster’s trillion stars, plus dark matter, acts as a 2-million-light-year-wide “lens” in space. This “gravitational lens” ...

The Hubble Space Telescope was originally expected to last about 15 years in orbit, before its optical surfaces became too ...

Over 20 years ago, the Hubble Space Telescope looked at a little patch of sky for days, with this methodical approach catching the light of galaxies that existed when the universe was not even 1 ...

In the summer of 1995, Robert Williams, then director of the Space Telescope Science Institute, which manages the Hubble Space Telescope's research program, was paid two visits by the renowned ...

NASA's Hubble Space Telescope has spied three young stars shining through a nebula as they orbit each other, one of which is about to ignite. This "glittering cosmic geode" triple-star system—each ...

The unveiling today of the Hubble Ultra Deep Field, a spectacular new set of images from the Hubble Space Telescope, brings mixed emotions to astronomers at the University of California, Santa Cruz, ...

The Hubble Space Telescope as seen from the Space Shuttle Discovery in December 1999. Credit: NASA In the summer of 1995, Robert Williams, then director of the Space Telescope Science Institute, which ...