Stars

Neutron stars are the universe's most extreme stars, composed of matter so dense a teaspoon of it would weigh as much as Mt. Everest. So, when they collide, it's quite the event.

A newly discovered star 30 times as large as the sun has a baffling chemical composition that could provoke a revision to stellar evolution models.

Astronomers are investigating a cosmic crime scene to determine why the death of a massive star left behind a highly magnetic "corpse."

A new AI-powered algorithm has discovered over 300 polluted white dwarfs in the Milky Way that were overlooked in old telescope data.

V889 Herculis is an oddball unlike any other star we've ever seen. The nearby sun-like star rotates in a strange way that defies prediction.

Ten neutron stars found lurking in the Milky Way include cosmic black widows killing stars with "webs" of viscous plasma and a speed demon that spins over 700 times per second.

Do dead stars glow? A strange gravitational phenomenon could be generating enormous amounts of light around neutron stars, new research suggests.

Citizen scientists have discovered what may be a brown dwarf racing through the cosmos at around 1.2 million miles per hour. Now astronomers want to know what launched it.

Astronomers have detected 21 rare systems with widely separated neutron stars and sun-like stars. These binaries are "one in a million" and challenge dead star binary formation models.

NASA's ISS-mounted X-ray telescope NICER has weighed and measured the closest pulsar to Earth. The neutron star PSR J0437 spins 174 times a second and has a mass of 1.4 suns.