The earliest light in the universe has been traveling across space since just after the Big Bang. Known as the cosmic ...

You could swim through the deepest voids and encounter a single hydrogen atom in an entire football field's worth of space.

In the Big Bang Theory, the cosmic microwave background — microwave-range radiation that floats through the entire universe ...

New observations support the idea that hot, diffuse threads of gas called cosmic filaments connect clusters of galaxies ...

For years, scientists have worked to chart the universe’s massive structure, aiming to test key models of cosmology. These ...

To understand gravitational lensing and dark matter, James Jee, a professor at Yonsei University, says to think of a pond ...

Webb’s new images of the Bullet Cluster reveal the most detailed dark matter map yet, shedding light on cosmic collisions and ...

A vast filament of gas stretching across the cosmos may help solve the mystery of the Universe’s missing matter. Astronomers ...

Seen as a long strand with smaller threads branching, the Quipu superstructure contains 68 galaxy clusters spanning 1.4 ...

The cosmic microwave background is the oldest light in the Universe, emitted about 380,000 years after the Big Bang. It corresponds to the moment when the Universe became cool enough for electrons and ...

The astronomers who operate powerful Vera C. Rubin observatory released debut images June 23, 2025, showcasing just exactly ...