Scientists narrow the search for dark matter using new galaxy simulations
Stellar streams have long been treated as relatively smooth structures whose gaps, kinks and spurs could reveal invisible…
2-kiloparsec trail of stars could reveal how dark matter shapes galaxies
A thin ribbon of stars around the ultra-diffuse galaxy UGC 9050-Dw1 may be the first globular-cluster stellar stream…
Astronomers discover three distinct groups of merging black holes
Black hole collisions do not appear to come from one simple cosmic recipe. After studying more than 150…
Nearly invisible galaxy may be built mostly of dark matter, Hubble finds
A tight clump of four star clusters sits in the Perseus galaxy cluster, and at first glance it…
Gaia Detected an Entire Swarm of Black Holes Traveling Through The Milky Way
A fluffy cluster of stars spilling across the sky may have a secret hidden in its heart: a…