A supermassive black hole has astonished astronomers after it was observed blasting out powerful winds raging at roughly one-fifth the speed of light. Two X-ray observatories, the European Space ...

Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand ...

Astronomers are a step closer to cracking one of the secrets of dark energy—the mysterious force believed to be causing the universe's accelerated expansion.

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space ...

American astrophysicist and science communicator Neil deGrasse Tyson, and English physicist, science communicator, and ...

"We might lose the ability to observe about 30% of the faintest galaxies. We are at the point of starting to be able to see ...

Before 3I/ATLAS, the only other confirmed interstellar tourists we've seen were the now-famous, cigar-shaped 'Oumuamua' in ...