What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy clusters, and dark matter.

The low carbon levels are particularly interesting, as previously discovered “pristine” or metal-poor stars generally ...

A faint radio "whisper" from ancient hydrogen reveals the universe was heating up long before it filled with starlight.

On human timescales, the universe may as well be eternal. It’ll be here long after our species and our planet are gone, but ...

A star found in the Large Magellanic Cloud is remarkably unpolluted by heavier elements, suggesting it is descended from the ...

For the first time, astronomers have used NASA’s James Webb Space Telescope (JWST) to get a clear look at a giant star right ...

Not all stars are created equally. Astronomers believe that the first stars to form after the Big Bang were mostly made of ...

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

Most cosmologists believe that these stars were the first large, free-floating structures to illuminate our universe, and that black holes appeared later. But some have proposed that it went the other ...

The Methuselah Star, also known asHD 140283, has long been a subject of fascination among astronomers. Its age, initially ...