Quasars are the most luminous type of active galaxy. They emit light across the electromagnetic spectrum, produce powerful ...

The Hubble Space Telescope has provided the most detailed survey of the Andromeda galaxy, revealing new clues about its ...

Scientists are revolutionizing our understanding of the universe’s most mysterious component: dark matter, the invisible ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

Recent studies challenge the long-held belief that the Milky Way is a standard model for understanding galaxy formation, ...

This rare quasar with spiral arms could help astronomers understand how supermassive black holes feed and grow.