Astronomy

A "guest star," briefly seen in 1181, was created by colliding dead stars, according to new simulations that may finally solve an 800-year-old cosmic mystery.

A strange class of space rock known as a "dark comet" has qualities of both asteroids and comets — and the hard-to-spot objects may pose a larger threat to Earth than we thought, according to new research.

The Delta Aquariid meteor shower begins this week, bringing as many as 20 "shooting stars" per hour to the night sky. Here's why this year's shower offers ideal conditions for stargazers.

Deals Nab a fantastic discount on this adorable Galaxy Projector with an Amazon coupon.

July's full moon — also known as the Buck Moon, the Thunder Moon and the Hay Moon — will be at its fullest on the night of July 21. It's the last "regular" full moon before a parade of four consecutive "supermoons" light up the sky.

Black hole growth is slowing down, suggests a team of astrophysicists who looked back in time across the universe's 13.8 billion-year history.

Black holes aren't "cosmic vacuum cleaners," but what would happen if one wandered into our solar system?

To mark its second anniversary of operations, James Webb Space Telescope scientists share a stunning view of the Penguin and Egg galaxies as they slowly collide.

Seven strangely-behaving stars in the Milky Way's Omega Centauri cluster may be under the influence of an extremely rare type of black hole, new research suggests.

Using the James Webb Space Telescope, astronomers have witnessed the dramatic dance between a supermassive black hole-powered quasar and merging galaxies less than a billion years after the Big Bang.