Astronomy

Fresh images show off the Euclid space telescope’s ability to capture crisp pictures of vast swaths of sky

The James Webb Space Telescope is gazing across the universe to find galaxies close to the “cosmic dawn”—and you can explore them from the palm of your hand

Several unexplained measurements are threatening to upend scientists’ understanding of the universe’s origin and fate

A planet-vaporizing impact is the leading explanation for a distant star’s curiously fluctuating light

Astronomers have found high-altitude clouds formed from quartz crystals on the gas-giant world WASP-17b

The James Webb Space Telescope’s infrared gaze sheds new light on the Orion nebula, an icon of the night sky

The sun’s magnetic poles are about to reverse as part of a regular 11-year sunspot activity cycle

Thirty years ago, astronomer Carl Sagan convinced NASA to turn a passing space probe’s instruments on Earth to look for life — with results that still reverberate today

Slow-moving stars at the Milky Way’s outskirts suggest our galaxy may be far lighter than previously believed, with profound implications for dark matter

The European Space Agency says a software patch restored stability to its cosmos-mapping Euclid spacecraft — but slower operations could extend the mission

Of the thousands of stars visible to the eye, only a few hundred are known to have planets. But that number may be far higher in reality

At times, the enormous BlueWalker 3 telecommunications satellite is brighter than some of the most iconic stars visible from Earth