Dark matter is hypothesized to outweigh "ordinary matter" in the universe by a factor of five. That means all the stuff we see around us on a cosmic level, like stars, planets, and moons, and on an ...

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.

Dark matter is hypothesized to outweigh "ordinary matter" in the universe by a factor of five. That means all the stuff we see around us on a cosmic level, like stars, planets, and moons ...