Universe

The multiverse offers no escape from our reality—which might be a very good thing

A strange supernova remnant first appeared as a “guest star” seen in 1181 by sky watchers in China and Japan

This blazingly fast star is shooting through the Milky Way with a planet in tow

Cosmic surveys suggest the force pulling the universe apart might not be constant after all

We can and should look harder for evidence of alien visitors to our solar system

The cosmos is dark. The Lilly-Madau diagram reveals that it will become much darker still

The James Webb Space Telescope’s search for the earliest stars and black holes has yielded a very weird, very red, puzzle

Analyzing 1,504 supernovae into the distant universe, astronomers have shown the clearest evidence yet for cosmological time dilation as predicted by Einstein

NASA’s James Webb Space Telescope observed an unusually large and highly luminous galaxy at a record-breaking 290 million years after the big bang

The shape of the cosmos could be much more complex than anyone had ever imagined

Cosmic Microwave Background Stage 4, a top-priority project for U.S. astrophysics, was designed to make breakthrough observations of the universe’s very earliest moments. Now the U.S. government says it can’t currently support the project’s construction at the South Pole

For the first time, scientists observed matter’s free fall into a black hole’s “plunging region”