Galaxies

A ghostly giant galaxy called Nube may become a testbed for esoteric theories of dark matter

A serendipitously discovered object nearly as massive as the Milky Way appears to be made of primordial gas that has formed almost no stars

Astronomy is beautiful and elegant. The language we use to describe its processes is anything but

This year’s most interesting space images include infrared views of galactic “bones,” an asteroid’s double moon, Jupiter’s giant polar vortex, and more

No one has ever seen a newborn star feeding on its natal disk anywhere outside our galaxy—that is, until now

Amaterasu—the most powerful cosmic ray seen in three decades—seems to come from an empty point of the sky. New telescopes may solve the mystery of its origins

Money, engineering and sheer geometry may mark an end of the line for building ever larger astronomical telescopes

The Xuntian Space Telescope is China’s entry in a global race to unlock the secrets of dark energy, and it will now lift off no earlier than mid-2025

The earliest active supermassive black hole ever seen offers clues on how these enigmatic objects first formed

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