Astronomy

Astronomers found two colliding galaxies dating back to less than 500 million years after the big bang

The sun is quickly approaching a major peak in solar activity. Experts warn it could potentially begin by the end of 2023, years before initial predictions suggested

Our planet’s not-quite-circular orbit means that on July 6 we’ll be about 2.5 million kilometers farther from the sun than average—but we won’t feel any colder

The cold and mysterious Oort cloud at the edge of our solar system may be hiding a rogue planet

Professional and amateur astronomers alike are hoping that Comet C/2023 A3 will sparkle in Earth’s skies in the fall of 2024, although comets are notoriously difficult to predict

Nearly 100 years ago a young astronomer named Cecilia Payne changed the way we see the stars in the sky because she was able to look into their burning heart and see something no one else ever had

Observations from the James Webb Space Telescope suggest that TRAPPIST-1 c, the second world in a seven-planet system, lacks an atmosphere

The wildfire smoke that smothered the U.S. Northeast last week has surprising connections to astrophysics—and to the historic search for our place in the cosmos

The James Webb Space Telescope is giving us our first glimpse of stars in the early universe.

Telltale evidence gathered by the James Webb Space Telescope suggests we’re closer than ever before to finding elusive Population III stars

Our planetary neighbor Venus becomes a brilliant beacon in the sky each time it reaches its greatest orbital distance from the sun

Magnetic fields help to explain why some stars are spinning more slowly than astronomers thought they should