A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...

After five years of staring unblinking at the sky, the Atacama Cosmology Telescope (ACT) has compiled the most detailed map we've ever seen of the cosmic microwave background – the faint light that ...

The structure and composition of the observable universe, within the framework of the theory, depend on how microcells proliferated, and how their energies evolved, during inflation. Each macrocell ...

This is just a small part of the universe—less than 1% of the entire observable universe—but it is our galactic neighborhood. And it is good to know the geography of your neighborhood.

This has given scientists their best look yet at the Cosmic Microwave Background (CMB) - the leftover radiation from the Big Bang which fills the entire observable universe. What looks like clouds ...

Equivalent to almost two trillion trillion suns, that’s the amount of mass (or its counterpart as energy) that these images show to exist in the entire observable universe, which extends almost ...

A trip back in cosmic time This cosmic trip back in time revealed that the observable universe extends for almost 50 billion light-years in all directions around us. The universe's mass was ...

Experts have unveiled the most detailed images yet of the universe’s infancy, capturing light that traveled for more than 13 ...