A missing star in the Andromeda Galaxy has puzzled astronomers, sparking theories from failed supernovae to stellar mergers.

"Until now, it was unknown what type of star would remain after the merger." ...

Quark stars are one of the wildest ideas in astronomy—objects so dense that even neutrons may break apart into free quarks. If they exist, they could represent an extreme “in-between” state, sitting ...

While two teams have ideas about what happened to yellow supergiant M31-2014-DS1, ultimately, it remains a mystery.

Solar storms are eruptions that release some of the energy stored in the sun's strong magnetic field. These can create ...

A giant star in the Andromeda Galaxy has vanished without a trace, leaving scientists puzzled and intrigued. First observed ...

From planet-scorching stellar outbursts to cataclysms so powerful they shiver the very fabric of spacetime, these are some of the biggest blasts our cosmos has to offer ...

Observations of nearby red dwarf stars reveal rare carbon and oxygen isotopes, offering direct evidence of stellar nucleosynthesis and the chemical evolution of the Milky Way.

NASA’s Chandra X-ray Observatory catalog provides over 400,000 sources and detailed X-ray mapping of the Milky Way center, ...

It is theoretically possible for a particularly massive star to collapse in on itself to form a black hole rather than ...

Astronomers used the James Webb Space Telescope and gravitational lensing to observe SN Eos, an ordinary supernova from the ...

Optical proof of a tiny companion orbiting supergiant star Betelgeuse is hard to come by. Hubble just spotted new evidence.