A groundbreaking study using the Hubble Space Telescope has revealed a truly astonishing discovery about our universe: it may ...

The Bootes Void,often called the Great Void, is one of the largest and most mysterious structures in the observable universe. Discovered in 1981 by astronomer Robert Kirshner and his team, this ...

A team of scientists is proposing a bold alternative to the Big Bang theory, suggesting that our universe may have formed ...

However, the observable universe extends farther than 13.8 billion light-years in every direction because, for all the time space has existed, it’s also been expanding.

James Webb telescope unveils largest-ever map of the universe The universe is 13.8 billion years old, but the observable universe stretches more than 13.8 light-years in every direction.

Astronomers setting their sights halfway across the observable universe recently identified the largest amount of individual stars ever detected so far away – a feat once considered near-impossible.

The universe is 13.8 billion years old, but the radius of the observable universe isn't 13.8 billion light-years. Instead, the observable universe is some 46.5 billion light-years across.

A controversial theory suggests the observable universe is the result of matter rebounding after the collapse of a black hole in another parent universe.

Think of a mystery musical instrument. If a physicist is told the loudness of the sound it makes at every possible frequency, ...

There are so many stars in the universe—hundreds of billions of them in our galaxy alone, which is, in turn, one of some 125 billion galaxies in the observable universe—that it would be ...

"We've measured more precisely that the observable Universe extends almost 50 billion light-years in all directions from us," says cosmologist Erminia Calabrese of the University of Cardiff in the ...

And when it comes to studying suitably large patches of the universe, cosmologists are very limited indeed: the observable universe is only so big.