In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

"We've always known that we need something to complete the puzzle, but we haven't really known what shape or form those ...

About half of the non-dark matter in the universe cannot be accounted for by stars and galaxies alone. Now, scientists say ...

The Case of the Missing Matter "We robustly show that the gas is much more extended than the dark matter" relative to ...

Dark matter is hypothesized to outweigh "ordinary matter" in the universe by a factor of five. That means all the stuff we ...

The potential discovery of life elsewhere is down to the unprecedented sensitivity of Nasa's James Webb Space Telescope.

Astronomers may have uncovered a hidden population of galaxies that could rewrite what we know about the universe's evolution ...

The potential finds could be contributing to some of the faintest light we can see in the universe, say researchers.

"The existence of these galaxies could mean that the universe has formed significantly more stars than previously estimated," Steinhardt said in a statement on Wednesday. "It supports the idea ...

Our sun, like all stars, is made mostly of hydrogen and helium. They are by far the most abundant elements, formed in the ...

New data involving millions of galaxies and luminous galactic cores is providing fresh evidence that the enigmatic and ...

Astronomers have peered back in time to find what looks like a population of 'hidden' galaxies that could hold the key to unlocking some of the universe's secrets. If their existence is confirmed it ...