The discovery of medium-sized black holes allow us to trace the history of the giant black holes in the center of galaxies.
Including the color of the local environments of Type Ia supernovae in our analyses could help us use them as more precise cosmological tools.
Four new Milky Way dwarf satellite candidates were discovered in 2015 using the Dark Energy Survey. Fainter imaging data are used to further investigate their exact nature.
Observations of dim galaxies lensed by foreground clusters provides a way of measuring the progression of reionization.
Cosmologists revisit an idea for addressing the Hubble tension: that a local void is messing with our measurements along the cosmic distance ladder.
Today’s paper makes predictions for the yet-to-be-observed dwarf galaxy population around Andromeda’s satellite galaxy, M33. It provides scientific justification for a future mission with WFIRST.