Astronomy

The latest images from Euclid, a European mission studying dark matter and dark energy, are spectacularly beautiful—and scientifically promising

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

We should—and must—take careful measure of what we name cosmic objects and the terms we use throughout science

The next time you snap a selfie, consider thanking an astronomer for your phone’s camera

Failing hardware on NASA’s Hubble Space Telescope may lead to less science, officials say, but the space agency isn’t ready to pursue a private repair mission

The iconic star Polaris appears to be much younger than its true age. The secret: it’s eating another star

Instruments may fail, but humanity’s most distant sentinel will keep exploring, and inspiring us all

A supernova showering Earth with radioactive debris is a surprisingly common cosmic occurrence

The same massive sunspot cluster that gave Earth multiple nights of stunning aurora displays has now produced the largest flare of the current solar cycle

A giant sunspot cluster rivaling the one that caused the Carrington Event in 1859 could trigger a cannibal coronal mass ejection. But this is unlikely to cause major problems

Milestone observations from the James Webb Space Telescope reveal signs of an atmosphere on the inhospitably hot super-Earth 55 Cancri e

Alien worlds that glow like lightbulbs or harbor molten-rock rain are revealing planets’ profound cosmic diversity—and pointing the way toward finding those that truly resemble our own familiar Earth