galaxies
Missing Mass? Not on our Watch—Dr. Paul Sutter Explains Dark Matter
In the first episode of a new series with ArsTechnica - Edge of Knowledge - Dr. Paul Sutter explains the…
Nancy Grace Roman Telescope Will do its Own, Wide-Angle Version of the Hubble Deep Field
Remember the Hubble Space Telescope's Deep Field and Ultra-Deep Field images? Those images showed everyone that what appears to be…
If you had Radio Telescopes for Eyes, one of the Biggest Things in the sky Would be a jet of Material Blasting out of a Nearby Galaxy
Astronomers have captured a radio galaxy that spans 16 Moon-widths in the sky.
Astronomy Jargon 101: Irregular Galaxies
In this series we are exploring the weird and wonderful world of astronomy jargon! You’ll feel a little odd after today's…
Astronomy Jargon 101: Galactic Halo
In this series we are exploring the weird and wonderful world of astronomy jargon! You’ll wrap your head around today's topic:…
A Gravitational Lens Shows the Same Galaxy Three Times
Images from the Hubble Space Telescope are often mind-bending in both their beauty and wealth of scientific wonder. And sometimes,…
A Black Hole has been Found Lurking Just Outside the Milky Way
Astronomers have found a smaller, stellar-mass black hole lurking in a nearby satellite galaxy of our own Milky Way. The…
It Turns out There Were Supernovae Exploding all Over, we Just Couldn’t see Them
When the poet Horace said “We are but dust and shadow”, he probably didn’t think that dust itself could create…
The Largest Rotating Objects in the Universe: Galactic Filaments Hundreds of Millions of Light-Years Long
We've known for a while about the large-scale structure of the Universe. Galaxies reside in filaments hundreds of millions of…
Astronomers Can Predict When a Galaxy’s Star Formation Ends Based on the Shape and Size of its Disk
A galaxy's main business is star formation. And when they're young, like youth everywhere, they keep themselves busy with it.…