Rubin Observatory discovers two hidden companions of the Milky Way
Early observations reveal a faint galaxy and star cluster; hundreds more satellites may be waiting to be found
The Vera C. Rubin Observatory in Chile has discovered two previously unknown companions of the Milky Way, the tiny galaxy Aquarius IV and the star cluster Rubin-GC1, using only a small fraction of the data it is expected to collect over its 10-year survey, astronomers have reported.