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…
New study challenges existing knowledge for why galaxies stop forming stars
Most galaxy collisions do not cause galaxies to stop making new stars.A galaxy’s central black hole and its…
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…