The spiral arms of galaxies are among the most recognizable galactic features, yet we still know little about their precise formation mechanism. Today’s paper leverages new data from the Gaia mission to test some of the leading theories.
How can the orbits of satellite galaxies be used to pin down the mass of the Milky Way?
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.
A mysterious pair of stars speeding through the outskirts of our galaxy together puzzles astronomers
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?
What will new data from Gaia reveal about the formation and evolution of stellar streams in the Milky Way?