When cosmologists used different ways to measure the value of sigma 8, a number that denotes how clumpy the universe is, they ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

The polarization of light from the cosmic microwave background is key to understanding the young Universe. Sigurd Naess points out that ACT has five times higher resolution than Planck.

A never-before-seen image of the cosmic microwave background, combining data from the Atacama Cosmology Telescope (ACT) and the Planck satellite, offers a high-definition view of the early Universe.

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding? Astronomers have tried two main methods to figure it out, but their numbers don’t ...

A new study published in the Monthly Notices of the Royal Astronomical Society suggests that the universe may be rotating — albeit extremely slowly — a discovery that could help resolve one of ...

In 1927 Georges Lemaître proposed that the Universe began with an explosion called the Big Bang. Hubble’s research into the red shift of galaxy light showed that the Universe was expanding ...

The map shows the cosmic microwave background (CMB), a faint remnant radiation from the early stages of the universe. It began as the earliest light just 380,000 years after the big bang ...