Galaxies

Astronomers spy the trail carved through interstellar gas by a massive runaway.

In addition to reacting to news as it breaks, we work to anticipate what will happen. Here we contemplate 12 possibilities and rate their likelihood of happening by 2050

A pair of studies of galactic supermassive black holes reveals surprising properties and behavior

MIAMI—A satellite launched by NASA in 2009 to map the entire sky in the infrared is capturing some pretty pictures along the way.

Cosmic inflation may have left a telltale imprint on the universe that could be detected in the coming years

An analysis of Tevatron data shows an asymmetry in the way particles known as neutral B mesons decay

The XENON100 detector in Italy should have been able to confirm previous dark matter signals

As South Africa angles for a massive telescope project, its own SALT telescope has been offline for a year

The Hubble Space Telescope passed its 20th anniversary of reaching orbit on April 24, an occasion marked with the release of a new image from the venerable observatory, depicting a star-forming region of the Milky Way some 7,500 light-years away called the Carina Nebula.

looks at a troubled history, some remarkable discoveries and the future of the instrument.