The greater the cosmic-ray energy, the greater its interaction cross-section, meaning it is more likely to interact with CMB ...

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

Cosmic microwave background is a sea of radiation that provides ... has since been revived to describe the mysterious dark energy that is currently speeding up the universe’s acceleration.