We’ve been told by science that the universe is expanding relentlessly, driven by a mysterious force called dark energy.

New data from major dark-energy observatories suggest the universe may not expand forever after all. A Cornell physicist calculates that the cosmos is heading toward a dramatic reversal: after ...

WASHINGTON (Reuters) - Fresh corroboration of the perplexing observation that the universe is expanding more rapidly than expected has scientists pondering the cause - perhaps some unknown factor ...

You might think galaxies can’t ever find each other in our runaway cosmos, but it turns out gravity can sometimes overcome ...

NASA's Hubble Space Telescope shows off an infrared view of the spiral galaxy M51, dubbed the Whirlpool Galaxy. In simplest terms, the rate at which the universe expands on paper doesn’t match actual ...

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding? Astronomers have tried two main methods to figure it out, but their numbers don’t ...

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark ...

The new study used the known distance to a galaxy called M106/NGC 4258 — a spiral galaxy in the constellation Canes Venatici — as a reference point. The universe is expanding faster than astronomers ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be straightforward. Objects are still emitting light, and that light takes time to travel ...

The universe is vast, beyond what we can truly comprehend. But how big is it, really? In this video, we explore the incredible size of the universe, from its observable limits to the theories that ...