Astronomy

The quirks of light moving through gas are the cause of stellar twinkling, which can be a bane—and sometimes a boon—for astronomers

NASA’s astrobiology ambitions are at risk of collapsing under the White House’s proposed budget. But your voice can make a difference

The sun has produced stunning auroras on Earth in recent years as solar activity has peaked—but expect more in coming years

Galaxies come in many shapes and sizes, and trying to define them is difficult

An enormous glowing cloud that contains approximately 3,400 solar masses worth of gas has been discovered near the solar system

Amazon has launched its first operational Project Kuiper satellites in its attempt to compete with SpaceX’s Starlink—but experts remain concerned about space debris and astronomy

We present a historical romp through Scientific American—100 years ago.

Happy anniversary to the Hubble Space Telescope, which launched on April 24, 1990

Amid harsh cuts, the Trump administration has proposed canceling the nearly ready-to-launch Nancy Grace Roman Space Telescope

ORCs—odd radio circles—are one of the weirdest recent discoveries in the heavens above

Leaked budget documents indicate that key NASA and NOAA research projects, such as crucial climate research and the Nancy Grace Roman Space Telescope, are at risk of being defunded in 2026

NASA’s James Webb Space Telescope provided a closer look at the aftermath of a star that wreaked violence on its planet