An international team of astronomers, including one from the University of Cape Town (UCT), has spotted a very rare sight in the early Universe: a galaxy that appears as an “Einstein Cross” – four ...

We’ve grown up with the idea that the universe will expand forever, meaning that something called the “cosmological constant” is positive. Space keeps stretching, galaxies drift farther apart, and ...

Galaxies "blazing with technosignatures" could suggest the existence of a "large number" of "different metasocieties." The Fermi Paradox, first devised by physicist Enrico Fermi in the 1950s, asks why ...

Artist’s impression of the powerful winds blowing from the bright X-ray source GX13+1. The X-rays are coming from a disc of hot matter, known as an accretion disc, that is gradually spiralling down to ...

The James Webb Space Telescope's latest image shows eight spectacular examples of gravitational lensing, a phenomenon that Albert Einstein first predicted some 100 years ago.

But a new study suggests that neither dark matter nor dark energy may actually exist. Instead, what scientists see as these mysterious forces could simply be an illusion, created by the slow weakening ...

Astronomy is, in essence, an exercise in inference. We cannot touch the stars, nor scoop up galaxies in a lab. Instead, we decipher the universe through its light — its color, intensity, rhythm and ...

What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy clusters, and dark matter.

This October, Emporia State University and the Peterson Planetarium invite you on an adventure that will span the galaxy and take you to some of the hottest places in the ...

If there is an absolute law in the universe, it’s that nothing can travel faster than the speed of light. Space is big, and while the speed of light is incredibly fast to us humans, on interstellar ...

Astronomers have long thought the universe should look generally the same in every direction, but an anomaly in the radiation from the big bang persists even after a new analysis from radio telescopes ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us humans, on interstellar scales it’s glacially slow. Even at a photon’s ...