About 50 light-years from Earth, a gas giant about half the mass of Jupiter orbits a sunlike star. The discovery of Pegasi 51 b ushered in a new era of exoplanet research.

"Haven Demo will test critical systems for Haven-1, including propulsion, flight computers and navigation software." ...

New experiments show young rocky planets can generate water naturally when molten surfaces react with hydrogen in their early atmospheres.

In the early chaos of planetary formation, before crusts cooled or atmospheres settled, water might already have been ...

Efforts to discover extraterrestrial life are increasingly engaging scientists. However, a recent study presents a rather pessimistic view about such a discovery. According to researchers, ...

Liftoff of the CMS-03 satellite is scheduled for 6:56 a.m. ET on Sunday (Nov. 2). India will launch a huge and powerful communications satellite for its navy early Sunday morning (Nov. 2), and you can ...

If it is a galaxy, it would be the oldest known galaxy in the cosmos, but it could also be a brown dwarf or an early black hole.