For centuries, Europeans thought that eternal daylight saturated the cosmos. The shift to a dark universe has had a profound ...

New simulations of Milky Way-like galaxies reveal that the strange split between two chemically distinct groups of stars may ...

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

Cosmology is the study of the universe; its birth, evolution, and ultimate fate. This includes further developing and refining the prevailing model, the Big Bang theory, investigating the universe’s ...

Because dark matter is completely invisible to light, science had to look for clever new methods to spot it.