An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be ...

Whether the universe will "end" at all is not certain, but all evidence suggests it will continue being humanity's cosmic ...

For more than a century, physicists have suspected that the familiar three dimensions of space might be only a small slice of ...

A new set of precision distance measurements made with an international collection of radio telescopes have greatly increased the likelihood that theorists need to revise the “standard model” that ...

If the Universe is 13.8 billion years old, and the speed of light is truly our cosmic speed limit, how far away should we be able to see? The answer seems obvious: 13.8 billion light-years, since a ...

The universe is expanding. That much is clearer. But it’s less clear whether this expansion is accelerating or slowing down.

NASA's James Webb Space Telescope has helped astronomers determine the distance to nearly 200 galaxies and galaxy clusters formed in the universe's early days. One of the first publicly released ...

Using a cosmic magnifying glass to peer into the deepest reaches of space, two teams of astronomers have discovered tiny galaxies that may be among the most distant known. Images suggest that one of ...

If you were to go as far out into space as you can imagine, what would you encounter? Would there be a limit to how far you could go, or could you travel a limitless distance? Would you eventually ...

A cosmic measurement technique independent of all others adds strong evidence pointing to a problem with the current theoretical model describing the composition and evolution of the Universe. A new ...