We usually think of satellites as small objects orbiting planets or stars. But in the broader universe, galaxies themselves ...

A Dartmouth-led study identifies potentially more that 300 small galaxies orbiting low-mass systems known as dwarf ...

Plus: The August Full Sturgeon Moon shines, the colorful double star Albireo sparkles, and Mercury reappears in the sky this ...

A fifth planet has been detected within the habitable zone of a neighboring star, where conditions could perhaps support ...

Astronomers observe a dramatic event on exoplanet TOI 1227 b. This young gas planet is losing its atmosphere quickly. Intense ...

We usually think of satellites as small objects orbiting planets or stars. But in the broader universe, galaxies themselves can have ...

Like many other lantern sharks, the dwarf lantern shark is the smallest shark in the world and has light coming from organs called photophores along its stomach and fins.

Pluto reaches opposition and the Moon waxes to First Quarter as shooting stars streak through the sky this week.

The newly discovered L 98-59 f is a super-Earth, with a minimum mass 2.8 times that of our planet. It follows a nearly circular 23-day orbit around its star, receiving about the same amount of stellar ...

A newly discovered exoplanet, located just 35 light-years from Earth, could be one of the most promising places to search for ...

Astronomers found strong evidence that a gassy Jupiter-size world is orbiting one of three stars in the stellar system ...