Apples-to-apples comparisons in the distant universe are hard to come by. Whether the subject is dwarf galaxies, supermassive black holes, or 'hot Jupiters,' astronomers can spend months or years ...

Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy.

A thin shell of air wraps around Earth, stretching about 20 miles above the surface. This invisible veil is packed with tiny ...

Of the more than 5,000 exoplanets that have been confirmed so far and many more thousands of candidates, most orbit stars the ...

Astronomers used the Hubble Space Telescope to image "peculiar" galaxy Arp 184 (NGC 1961) about 190 million light-years away.

Check out these star snaps. As the Hubble Space Telescope celebrates the ... The photos capture both our neighboring planets and galaxies far, far away in a stunning release to celebrate one ...

Astronomers have discovered a previously unknown birthplace of some of the ... star. The astronomers calculated that such flares could be responsible for forging up to 10% of our galaxy's gold ...

Findings from a new study into the cosmic "afterglow" may rewrite the history of the universe, according to researchers. This afterglow—the "cosmic microwave background" (CMB), the relic ...

scientists haven’t been able to account for about 15 percent of the regular matter in the universe with just stars, planets, and other celestial objects. A new study by 75 scientists across ...

Thirty-five years ago, the Hubble Space Telescope was launched into orbit. It's been sending back galactic data and images ever since.