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

The craft followed the Earth around the sun, staying on the dark side of our planet. From this perch, WMAP was the first to measure the Cosmic Microwave Background (CMB), the leftover light from ...

So, light absorbed from the cosmic background radiation tells us when the dark ages ended, and light absorbed from the first quasars tracks the last phases of the subsequent reionization.

An alternative to Einstein's theory of general relativity called "TeVeS" could describe the formation of cosmic structure without requiring the existence of dark matter, say physicists in the US (Phys ...

But scientists from the US and Japan have collaborated to shed light on this darkness after developing a new method examining how shadowy dark matter masses distort the cosmic background brightness.

For objects more than nine billion light-years away, DESI detects matter by the way it soaks up light from supermassive black holes glowing in the background. At each slice of cosmic history ...

Now, astronomers have detected very faint light from these cosmic web filaments in the deep, dark, distant universe ... using new methods to filter out background light, such as that from our ...

called the cosmic microwave background, the DESI data shows that dark energy’s impact could be weakening over time. “If this continues then eventually dark energy will not be the dominant forc ...

"And we're not just seeing light and dark, we're seeing the polarization ... measured the polarization of light from the cosmic microwave background (CMB). That's the faint microwave glow that ...

Simulations suggest cosmic webs, made of filaments of dark matter, stretch throughout ... The cosmic microwave background — the leftover light from when the universe was only 380,000 years ...