Galaxies

Vast reaches of mostly empty space could offer superior odds for detecting the invisible substance thought to make up more than 80 percent of the material in the universe

THESAN—the largest, most detailed computer model of the universe’s first billion years yet made—is helping set expectations for observations from NASA’s James Webb Space Telescope

Using a technique to block certain wavelengths of light, researchers hope to discover many more hidden pulsars

Data from the CHIME radio observatory are a milestone in the quest to discover the hidden origins of universal structure

NASA and the German space agency ground the telescope on a plane, citing the astronomy community’s concerns over cost and productivity

A debate over conflicting measurements of key cosmological properties is set to shape the next decade of astronomy and astrophysics

The surprisingly bright galaxy, called HD1, may contain some of the universe’s first stars, as well as a supermassive black hole

Revisiting a controversial claim, astronomers are laying bare deep uncertainties about our understanding of galactic centers

Researchers have sighted only a handful of these odd radio circles and are trying to pin down what causes them

The $25-million facility in Namibia will be the continent’s first millimeter-range astronomical observatory

The observatory has flawlessly unfurled its mirrors and sunshield—although more steps are needed before the science can begin

In a fraction of a second, the outburst released as much energy as our sun produces in 100,000 years