A neutron star’s density is mind-boggling. These stars are composed almost entirely of neutrons packed together in a tiny radius. Just a teaspoonful of this material would weigh over a trillion ...

Japan's SKY Perfect JSAT will invest about $230 million to build a constellation of low-Earth orbit satellites using U.S. company Planet Labs' Pelican satellite, the company said on ...

The ESA’s Gaia mission mapped the positions and velocities of stars with extreme precision by measuring about one billion ...

Japan's SKY Perfect JSAT will invest about $230 million to build a constellation of low-Earth orbit satellites using U.S.

Scientists discovered WASP-121b, an exoplanet where metals rain from the sky. Located 858 light-years away, this 'ultra-hot ...

Using data from the European Space Agency's Gaia mission, scientists have found a huge exoplanet and a brown dwarf. This is the first time a planet has been uniquely discovered by Gaia's ability to ...

Scientists work to define a “habitable zone,” which means that if it’s too close to a star, the water heats and evaporates, and too far, it freezes. Also, the atmospheric conditions need to be just ...

Rumors of a space nuke made geopolitical tensions extend into orbit. Amid an Escalating Arms Race in Space with Russia and ...

With an assist from the NEID spectrograph, a team of astronomers have confirmed the existence of exoplanet Gaia-4b—one of the ...

Don't put your binoculars away just yet, the planet parade continues through February. Here's which planets will be visible ...

From planets and constellations, to eclipses and the Aurora Borealis, here's what to look for in the sky this spring ...

SpaceX's Starship might have released harmful air pollutants into the atmosphere, as well as shards of hot metal.