How to turn two galaxies into ten
A group of galaxies — some rich in dark matter, and some lacking dark matter completely — could be explained by a violent, destructive event from their past.
Not all black holes that wander are lost – and now, some may have been found.
In today’s paper, astronomers look for meandering modern-day analogues of the ancient building blocks of supermassive black holes.
Stellar Streams as Dark Matter Maps
Stellar streams are beautiful structures that trace the dark matter distribution of a galaxy. Today’s paper looks beyond our Milky Way for streams in external galaxies.
When Gaia meets Hubble: accurate proper motions for faint stars
A powerful new tool combines data from Gaia and the Hubble Space Telescope and accurately measures how stars move on the plane of the sky. Find out how it’s done in today’s Astrobite!
How’d that gas get there? The answer is blowin in the wind
Today’s authors find that the edge of the Milky Way’s neighborhood might not be so empty after all.
![RRow RRow RRow Your [Tele]scope, Gently Down the [Orphan] Stream](https://astrobites.org/wp-content/uploads/2022/02/streams-320x260.jpeg)
RRow RRow RRow Your [Tele]scope, Gently Down the [Orphan] Stream
Where are your parents? The authors of today’s paper investigate the origins of the Orphan Stream in our galaxy!