3I/ATLAS is the fastest comet ever recorded and its interstellar! NASA's Goddard Space Flight Center explains. Credit: NASA's ...

For 25 years, one of the Milky Way’s strangest stellar explosions hid its culprit behind its own debris. Now the dust has ...

Scientists are documenting a planetary system in the Milky Way galaxy that is so starkly dissimilar to our own solar system ...

Omega Centauri black hole: NASA's Hubble and Webb have confirmed the first stellar-mass black hole ever found in Omega ...

Artistic illustration of how the Milky Way’s disc may have shifted by more than 90 degrees. The faint outline shows its possible former orientation, while the surrounding stellar halo preserves clues ...

Andrea Ghez developed a way to peer through dust clouds and observe stars orbiting the supermassive black hole at the center ...

Mysterious high-speed "bullets"—clumps of possibly oxygen-rich gas traveling at up to 20 million miles per hour—have been ...

The Milky Way may not always have faced the same direction. New simulations suggest its stellar disc could have swung through ...

We are still not sure what the correct expansion rate of the universe is; stellar astronomers have now put forward a ...

The Milky Way and Andromeda have appeared locked on a destructive course for decades. Now, thousands of simulations suggest their collision is not destiny, but a contest between gravity, uncertain ...

Astronomers have used the ages of more than 155,000 stars in the Milky Way to independently estimate the age of the universe, ...

The space between stars just got a little sweeter. Astronomers have detected a type of sugar in space that's also found in ...