"Why do they have the same rotation? They must have a connection with each other — that would be a very strong question that ...

Seconds after the Big Bang, the Universe exhibited an astonishing simplicity. Observations reveal a spatially flat, radiation ...

Determining the expansion rate of the universe, the "Hubble constant," shapes our understanding of the cosmos, its age, and its fate.

Astronomers have identified the largest and most distant water reservoir ever detected in the universe. This immense ...