The Andromeda Galaxy, our Milky Way’s colossal neighbor, lies 2.5 million light-years away yet shines visibly in dark skies.

This unprecedented view of the Bullet Cluster provided by the James Webb Space Telescope and the Chandra X-ray Observatory ...

D ay 9 of the 2024 Space Telescope Advent Calendar: a dark and dusty galaxy. This Hubble view of NGC 1546, ... Brilliant-blue regions of active star formation sparkle through the dust.

Scientists discovered a galaxy, AGC 114905, that may not have dark matter, and they are not quite sure how. ... with the stellar emissions highlighted in blue and the neutral hydrogen in green.

The mass-to-blue-light ratio of the object is over 500 — at least 10 times that of the Milky Way. “This may be a dark galaxy that has failed to form stars because the low disk-surface density ...

This Galaxy Has Almost No Dark Matter—and Scientists Are Baffled. If astronomers really have found an "undark" galaxy, it’s a strong clue that dark matter is real.

Using data from the Hubble and Chandra space telescopes, scientists have determined that dark matter ghosted through the wreckage of two colliding galaxy clusters over 5 billion light-years away.

A distant galaxy appears filled with dark matter. The outermost stars in the Cosmic Seagull, a galaxy 11.3 billion light-years away, race too fast to be propelled by the gravity of the galaxy’s ...