Black hole light echoes are an extreme form of gravitational lensing. To measure the masses and spins of black holes, ...

SPHEREx will explore the universe in 102 infrared colors, providing unprecedented insights into cosmic origins.

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

Since the discovery of the acceleration, theorists have calculated that the universe will continue to expand faster and ...