Discovery of 250 ‘mini galaxies’ could help scientists pin down the nature of dark matter
Only a fraction of the size of the Milky Way, these galaxies have thus far been too faint for most telescopes to spot.
These gorgeous new images of the cosmos from NASA’s Chandra X-ray telescope took our breath away (video)
NASA has unveiled a dazzling new collection of cosmic images from the Chandra X-ray Observatory, capturing spectacular stars and galaxies in unprecedented detail.
Astonishing ‘halo’ of high-energy particles around giant galaxy cluster is a glimpse into the early universe
A distant cluster of galaxies is wrapped in a vast halo of high-energy particles that could be the work of supermassive black holes or a cosmic particle accelerator.
This galaxy cluster has mysterious cosmic tendrils over 200,000 light-years long (image)
Astronomers have taken an unprecedentedly detailed look at the tendrils and filaments that wrap around supermassive black hole-dominated galaxies of Abell 2255.
Scientists spot high-speed galaxy collision 11 billion light-years away: ‘We hence call this system the cosmic joust’
A galactic collision 11 billion light-years away reveals how an actively feeding supermassive black hole disrupts star formation in a nearby galaxy.
NASA diagnoses fracture in a ‘huge cosmic bone’ using X-ray observatory
A combination of X-ray from NASA's Chandra observatory and radio data indicates that a galactic "fracture" was likely caused by a special neutron star called a pulsar.
Gaze at a cluster of glowing galaxies | Space photo of the day for May 2, 2025
Galaxy cluster Abell 1489, as imaged by the International Gemini Observatory, contains more than 200 of the gravitationally-bound systems of stars, stellar remnants, interstellar gas and dust.
Our galactic neighbor Andromeda has a bunch of satellite galaxies — and they’re weirdly pointing at us
The Andromeda galaxy's family of satellite galaxies point towards the Milky Way, and nobody knows why.
Vast swarms of hidden galaxies may be secretly bathing the universe in a soft glow
A fog of long-wavelength infrared light could be produced by dusty, star-forming galaxies that have remained hidden — until now, that is.
Incredible photo shows supermassive black hole blowing a jet of matter into interstellar space
A spiral galaxy known as NGC 4945 exhibits powerful winds of material blowing from the supermassive black hole located at its core in a new photo taken by the Very Large Telescope in Chile.