Galaxies

Latest about Galaxies

An artist's impression of the warped disk of the Milky Way, surrounded by a slightly flattened dark matter halo.

Astronomers measure 'warp speed' of Milky Way galaxy

By Keith Cooper published

The Milky Way is warped, and the alignment of this warp is precessing backwards around the galaxy under the influence of a squashed dark matter halo.

Galaxies
a radio galaxy with dark wispy structures expanding out from the center with a bright yellow light at the heart.

What are radio galaxies?

By Robert Lea last updated

Reference A radio galaxy is a type of galaxy with giant regions of radio emissions that reach far beyond its visible structure. We explore them in more detail here.

Reference
A black background with glowing white blue and yellow orbs scattered across it, some within a yellow dotted circle

Scientists finally found 2 of the Milky Way's missing satellite galaxies. What could this mean for astronomy?

By Robert Lea published

Astronomers have found two of the Milky Way's missing satellite galaxies, a step toward earning a better understanding of dark matter.

Galaxies
The clashing galaxies NGC 4568 (bottom) and NGC 4567 (top) as seen by the Gemini North telescope in Hawai‘i

How are galaxies destroyed?

By Paul Sutter published

Space mysteries If you're in the mood to destroy an entire galaxy, you have several options, depending on your desired level of destructiveness.

Space mysteries
A bright white disk with an orange sphere at its center against a dark background and surrounded by white smoke

The Milky Way's last major act of galactic cannibalism was surprisingly recent

By Robert Lea published

Gaia discovers the Milky Way's last major act of galactic cannibalism was surprisingly recent, as the space telescope counts the "wrinkles" of our galaxy to retell its history."

Galaxies
a white spiral of stars and gas in space

Does the Milky Way orbit anything?

By Skyler Ware published

Do galaxies, including our own Milky Way, orbit anything in the universe?

Galaxies
Two galaxies that appear to be in the process of merging. They're both spirals and kind of hazy. They're seen against the backdrop of space.

AI finds hidden galactic evolution clues in over 100 galaxies. Here's how

By Rahul Rao published

Scientists enlisted AI to help peruse a massive dataset in search of neutral carbon absorbers in galaxies, which can reveal lots about galaxy evolution.

Galaxies
A collage of several galaxy images. The one on the left takes up nearly half of the screen and showcases a diagonal, edge-on view of a hazy realm.

Amateur astronomer finds 5 fascinating new galaxies — and they're now named after him

By Robert Lea published

Giuseppe Donatiello is an amateur astronomer with a unique distinction: discoverer of 11 galaxies, nine with his name.

Galaxies
The Jamess Webb Space Telescope's view of the spectacular Phantom Galaxy

Is dark matter's main rival theory dead? There's bad news from the Cassini spacecraft and other recent tests

By Indranil Banik, Harry Desmond published

One of the biggest mysteries in astrophysics today is that the forces in galaxies do not seem to add up.

Galaxies
Magnetic fields seen in the halo of the Milky Way

Milky Way's halo is filled with 'magnetic donuts' as wide as 100,000 light-years

By Robert Lea published

The discovery could help astronomers better understand how cosmic magnetic fields form and evolve.

Galaxies
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