Six small, short-lived lava flows erupted at Kilaueaʻs Halemaʻumaʻu crater between midnight and 6 a.m. on Wednesday, March 19 ...

These rather small planets are a stone's throw from Earth in galactic terms, but were too small for previous instruments to ...

The U.S. State Department on Wednesday denied that data collected in a government-funded program that helps track thousands ...

Last year, astronomers announced that a planet orbits Barnard’s star. Now, researchers have confirmed the existence of three more.

Cosmic microwave background data support cosmology’s standard model but retain a mystery about the universe’s expansion rate.