In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

The Hubble Space Telescope captured the ​​colorful, wispy clouds near the Tarantula Nebula, one of the most luminous and ...

The Hubble Space Telescope’s latest stunning images have allowed scientists to solve the mystery of the Bullseye Galaxy’s ...

The center of our Milky Way galaxy is hidden from the prying eyes of optical telescopes by clouds of obscuring dust and gas.

Hubble’s high-resolution imagery allowed researchers to hone in on more of the Bullseye galaxy’s rings — and helped confirm ...

A small blue dwarf galaxy passed through the massive Bullseye galaxy. This impact created nine rings of new stars.

The James Webb Space Telescope has shown that the Milky Way’s black hole is constantly blazing with light, releasing long ...

While the events observed around Sgr A* are dramatic, this black hole is not as active as some at the center of other ...

The heart of a globular cluster, like Terzan 4, is packed with stars so tightly that individual stars are difficult to ...

Astronomers spent a decade compiling this special image with the Hubble Space Telescope and then stitched together 600 photos ...

Centaurus A: NGC 5128 is a galaxy in constellation Centaurus, discovered in 1826 by Scottish astronomer James Dunlop. Messier ...