It's well established that the universe is expanding, but there's serious disagreement among scientists over how fast it's happening.

Dark energy is one of those cosmological features that we are still learning about. While we can't see it directly, we can most famously observe its effects on the universe—primarily how it is causing ...

Theoretical research led by Professor Enrique Gaztañaga of the University of Portsmouth challenges the ...

They show up as a mathematical solution in general relativity, basically as a time-reversed version of a black hole. Some ...

For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

The big bang wasn’t the start of everything, but it has been impossible to see what came before. Now a new kind of cosmology is lifting the veil on the beginning of time ...

So cosmologists feel confident in modelling the universe using the “maximally symmetric” description of space-time in Einstein’s theory of general relativity. This symmetric vision for the universe, ...

The astrophotographers took advantage of the dark skies of South Downs to capture dramatic stories with the starlit skies.

Webb telescope data confirm a supermassive black hole fleeing its galaxy, carving a 200,000 light-year wake of new stars.

Brie Larson teased Rosalina again, but fans are freaking out over a subtle Super Mario Galaxy detail in the background.

The stunning image captures a star's dying moments wrapped in dust, light, and a cosmic conundrum still waiting to be solved.

Astronomers have reported one of the longest stellar dimming events ever recorded, with a Sun-like star fading by 97 percent for nearly 200 days. Astronomers believe one of the longest stellar dimming ...