About 4.5 million years ago, a great cosmic dog kicked past our Solar System – and its effects may still be seen today.

Using some of the world's most powerful telescopes, a team of researchers found more than 280 galaxies stretched in a line ...

I nterstellar comet 3I/ATLAS will make its closest approach to Earth this month, whizzing by at 270 million kilometers (168 million miles) away, putting on a show for anyone equipped even with a small ...

Critics argue the satellites, billed as a way to harness solar energy at night, could hamper sky observations and may pose a ...

A surprisingly mature spiral galaxy named Alaknanda has been spotted just 1.5 billion years after the Big Bang—far earlier ...

Two researchers from an astrophysics institute in Pune have discovered one of the most distant spiral galaxies ever observed - a massive, well-formed system that existed when the universe was just 1.5 ...

A spiral galaxy, shaped much like our Milky Way, has been found in an era when astronomers believed such well-formed galaxies ...

Astronomers have detected a mysterious gamma-ray glow from the Milky Way’s halo, potentially marking the first direct ...

Astronomers have discovered 53 new supermassive black hole-powered quasars that are blasting out jets of matter at near light ...

A scientist analyzing Fermi telescope data found a strange glow around the Milky Way that looks like it could be coming from ...

Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...