In the Big Bang Theory, the cosmic microwave background — microwave-range radiation that floats through the entire universe ...

You could swim through the deepest voids and encounter a single hydrogen atom in an entire football field's worth of space.

Is it possible to understand the Universe without understanding the largest structures that reside in it? In principle, not ...

"Using the new common signal, we can determine how much of what we're seeing is cosmic glare from light bouncing off the hood of the Cosmic Dawn, so to speak." ...

The microwaves that scientists are looking for from the Cosmic Dawn are extremely faint. It is about a million times weaker than regular cosmic microwave background radiation.

The CLASS telescope array has taken a fresh look at the infant universe to hunt for polarized light in the Cosmic Microwave Background that resembles light bouncing off a cosmic car hood.

NASA's Chandra X-ray Observatory has detected powerful black hole jets emanating from a galaxy 11.6 billion light-years away. These jets, formed durin ...

From four-dimensional hexagons to the mind-bending amplituhedron, geometrical shapes are wilder than we learn at school - and ...

New observations from the James Webb Space Telescope (JWST) suggest the cosmos may be much older than once believed. For ...

However, although photons of light existed since the first second after the Big Bang, they could not yet shine across the ...

What we saw in the DESI experiments, and now strengthened by our South Pole Telescope observations, is that dark energy is ...

Two supermassive black holes carrying the faint light of the Big Bang, 11.6 billion and 11.7 billion light-years away, have ...