Add Yahoo as a preferred source to see more of our stories on Google. Astronomers have identified what could be the largest structure ever observed in the known universe—a vast network of galaxy ...

Astronomers have found the most luminous object in the known universe, hiding in plain sight. Quasars are the brightest objects in the cosmos. So bright, in fact, that when they were first spotted in ...

Space. It's really, really big. How big is it? Well, according to astronomers, the observable universe is around 92 billion light-years in diameter, but that's all we can see (hence the word ...

Astronomers have discovered what may be the largest-scale structure in the known universe — a group of galaxy clusters and ...

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Quasars are supermassive black holes that sit at the center of enormous galaxies, accreting matter. They shine so brightly that they are often referred to as beacons and are among the most-distant ...

Astronomers have been mapping vast cosmic structures for decades, from galaxy clusters to immense superclusters. But now, researchers have identified what they say is officially the largest known ...

The most powerful events in the known universe—gamma-ray bursts (GRBs)—are short-lived outbursts of the highest-energy light. They can erupt with a quintillion (a 10 followed by 18 zeros) times the ...

The Gemini Observatory has released the first color image of what astronomers are calling the most distant object ever seen in the universe. The object is what is known as a gamma-ray burst (GRB) ...

There are dark places out there in the deep universe, vast Saharas hundreds of millions of light years across, empty except for a stray hydrogen atom or a bit of radiation. They are the cosmic voids, ...

A relatively nearby star that appears to lack almost any of the heavy elements produced by supernovae could be a direct descendant of the very first stars that formed in the universe. Astronomers ...