How heavy is our Galaxy?
How can the orbits of satellite galaxies be used to pin down the mass of the Milky Way?
Do the Milky Way’s Stellar Streams have that Fuzzy (Dark Matter) Feeling?
Stellar streams are an excellent tool for probing the nature of Dark Matter. Today’s paper tests whether Fuzzy Dark Matter is a viable theory by evaluating the thinness of streams in the Milky Way.
The speeding binary that shouldn’t exist
A mysterious pair of stars speeding through the outskirts of our galaxy together puzzles astronomers
Satellite Galaxies All in a Row—How So?
Many satellite galaxies in the local universe are orbiting their parent galaxies in highly coherent planes—yet such structures are vanishingly rare in simulations. What gives?
Clearing Up Stellar Streams with Gaia
What will new data from Gaia reveal about the formation and evolution of stellar streams in the Milky Way?
Dating the Evaporation of Globular Clusters
Globular clusters in the Milky Way are shedding their stars. How can we tell when this process began?