S A N  D I E G O, Jan. 9 -- A supercluster of quasars and galaxies massedtogether across 600 million light years of space is the largeststructure in the observable universe, astronomers say ...

James Webb Space Telescope reveals largest-ever panorama of the early universe. Vast cosmic voids are far from empty — they're hiding something dark. Latest in Astronomy.

Here are seven of the largest objects human beings have ever put into orbit. International Space Station At about 356 feet by 240 feet, the International Space Station is larger than a football field.

But if that's the smallest thing, what are the biggest things ever sent to space? The International Space Station. Image source, NASA. Image caption, ...

The icy giant is more than 10 times the size of any known comet, according to the National Radio Astronomy Observatory.

This will be the "biggest man-made fire ever in space," noted Gary A. Ruff, NASA's Spacecraft Fire Safety Demonstration project manager.. Pitts recounted that the only real experience of a fire ...

The biggest explosion ever seen has been spotted in space – and scientists don’t know for sure where it came from. The blast was brighter than almost anything ever seen and has been going on ...

An enormous amoeba-like structure 200 million light-years wide and made up of galaxies and large bubbles of gas is the largest known object in the universe, scientists say.