Earth and the entire Milky Way galaxy might be sitting inside an enormous, mysterious void—a giant cosmic hole making our universe expand faster right here than anywhere else. This unusual idea, ...

Some physicists think our reality is a kind of cosmic hologram, with space, time, and gravity as manifestations of a ...

Voids are not exactly empty (actually, the missing matter of the universe is spread there), and lonely galaxies and small groups might end up in one of those. But those galaxies would be pulled out of ...

Sound waves 'fossilized' in the arrangements of galaxies across the Universe support the theory that the Milky Way galaxy ...

Nearly 50 years ago, physicists floated a bold idea: our universe might be stuck in a false vacuum. This state feels stable, ...

Images of the cosmos, such as the James Webb Space Telescope’s deep space snapshot, make space look chock-full of stuff. In the grand scheme of things, it is, but all those stars, galaxies, planets, ...

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

New research suggests that the makeup of space ice might be quite a bit different than we previously believed.

Astronomy fans can zoom in practically forever into the stunning first images from the Vera C. Rubin Observatory ...

There are new hints that the fabric of space-time may be made of "memory cells" that record the whole history of the universe. If true, it could explain the nature of dark matter and much more ...

Astronomers want to unlock the secrets of the "Cosmic Dawn" by sending a miniature spacecraft to listen out for an "ancient ...