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

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s ...

A faint cosmic spin – one rotation per 500 billion years – could resolve the stubborn Hubble tension by tweaking standard ...

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 ...

Suddenly, after this event called the "last scattering," the universe was transparent. This first light is seen today as the CMB. Though it fills the cosmos almost ubiquitously, there are small ...

making the universe effectively opaque. The CMB represents the first stage in the universe’s history that we can see. The new images give a remarkably clear view of very subtle variations in the ...

One of the Holy Grails in cosmology is a look back at the earliest epochs of cosmic history. Unfortunately, the universe's first few hundred thousand years are shrouded in an impenetrable fog.

However, observations suggest that our universe is nearly flat (k = 0 ... signatures—such as specific patterns in the cosmic ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. New images of the infant universe captured by the Atacama Cosmology Telescope (ACT) are the ...