A quiet, glowing gas cloud has been hiding in plain sight not far from Earth. For decades, astronomers have predicted that ...

Sculptor—officially labeled NGC 253—is considered a starburst galaxy, one heavy with stellar action. It's located 11 million light-years away in the Southern Hemisphere's constellation Sculptor, and ...

NASA's James Webb Space Telescope (JWST) has produced a new image of the Bullet Cluster, which is a titanic collision between ...

By studying what makes the Milky Way unique, astronomers are hoping to understand our galaxy’s past and unravel the mystery ...

Because it doesn't interreact with light or electromagnetism, dark matter exists to us only through its influence on visible ...

Galaxies have an overall internal motion called disk velocity. It’s how gas, dust, and stars move around the galactic center.

A distant galaxy 12 billion light-years away shows signs of being a jellyfish galaxy, with trailing streams of gas caused by ...

When it comes to star formation, not all galaxies are the same. Some are quenched, meaning they've depleted their star ...

Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

A vast filament of gas stretching across the cosmos may help solve the mystery of the Universe’s missing matter. Astronomers ...

Admire our galaxy’s dramatic galactic core—a sparkly bulge of stars and gas—while summer’s short ‘Milky Way season’ lasts ...

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...