Galaxies
Latest about Galaxies
![a swarm of galaxies varying in size paints a scattering across black space.](https://cdn.mos.cms.futurecdn.net/Ej5YTR5bMNKPSSQTNLK9FC-320-80.jpg)
The universe might be younger than we think, galaxies' motion suggests
By Keith Cooper published
The motions of satellites in galaxy groups tell us that such groupings, and therefore possibly the universe, are younger than what standard cosmology tells us.
![A view of the sky with one dotted blue circle toward the top center and a dotted red art to the middle left.](https://cdn.mos.cms.futurecdn.net/eW8rnLTnYgijNfxsTJukJa-320-80.jpg)
An impossibly huge ring of galaxies might lead us to new physics. Here's how
By Keith Cooper published
This galactic superstructure appears to us as it was over 9 billion years ago.
![A simulated view of the Andromeda galaxy where Roman will search between stars to hunt dark matter](https://cdn.mos.cms.futurecdn.net/zbjGXZSys2MY8c2W3HJgLH-320-80.png)
Are gaps in the Andromeda galaxy filled with dark matter? This NASA telescope could find out
By Robert Lea published
NASA's forthcoming Nancy Grace Roman Space Telescope will zoom in on streams of stars in the Andromeda galaxy to hunt for dark matter.
![The Large Magellanic Cloud appears as a hazy purple cloud against a background of stars.](https://cdn.mos.cms.futurecdn.net/dvgpg2nZxsNfJeahhtvAJn-320-80.jpg)
What is the Large Magellanic Cloud?
By Keith Cooper last updated
Reference Learn all about the Large Magellanic Cloud, including what it is, what it features and its relation to the Milky Way.
![A galaxy that is flat and misshapen. Above and on its right it is covered by plumes of shining gas and dust, while its centre and left side are more dim and patchy. A trail of dark, dim dust stretches from below the galaxy up and off to the left, where there are three more bright patches. The background around the galaxy is quite dark, with only a few small background galaxies and one star visible](https://cdn.mos.cms.futurecdn.net/B6xAUDTevcaq7wT84gX3N5-320-80.png)
Hubble Telescope reveals galaxy that hosted a supernova 2.5 billion times brighter than the sun (photo)
By Robert Lea published
The Hubble Space Telescope zoomed into a galaxy 150 million light years away to study a supernova that released 2.5 billion times more energy than the sun, resulting in a stunning image.
![a white spiral of stars and gas in space](https://cdn.mos.cms.futurecdn.net/cUnCVWm2sE4wZQGyXJJVNZ-320-80.jpg)
How do we know what the Milky Way looks like?
By Paul Sutter published
Directly mapping the Milky Way is an extremely challenging task, but observations of other galaxies helped us piece together what our home galaxy looked like.
![illustration showing two concentric purple rings and a long, thin orange line in deep space.](https://cdn.mos.cms.futurecdn.net/wdEkK9rapwQNCtJcRD9EdF-320-80.png)
Surprise gamma-ray discovery could shed light on cosmic mystery
By Robert Lea published
An unexpected and unexplained gamma-ray signal from beyond the Milky Way found among 13 years of NASA Fermi Telescope data could be linked to another cosmic mystery.
![Hydrogen gas in the primordial galaxy J0613+52 with red indicating regions turning away from Earth and blue showing regions turning toward us](https://cdn.mos.cms.futurecdn.net/RvZoxs8p3L5AW8KRgS4o6C-320-80.png)
Astronomers accidentally discover 'dark' primordial galaxy with no visible stars
By Robert Lea published
Astronomers inadvertently discovered a "dark" galaxy rich in gas but lacking stars when they pointed the Green Bank Telescope in the wrong direction.
![A strange blob of green circles around a galaxy in deep space](https://cdn.mos.cms.futurecdn.net/TjtpyCqeHdAedNf58Eu5o9-320-80.jpg)
The mystery of vast 'cosmic ORCs' — odd radio circles that encompass entire galaxies — may be solved
By Robert Lea published
Mysterious "odd radio circles" or ORCs that compass entire galaxies may have finally been explained, with astronomers pointing the finger at winds from bursts of supernova star explosions.
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