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

The supermassive black hole in the heart of the Milky Way Galaxy, Sagittarius A*, constantly emits flares like fireworks.

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

Astronomers have discovered what they are calling the largest-known structure in the universe. Named "Quipu" after an Incan ...

The unseen gravitational attraction of the Great Attractor is dragging galaxies, including the Milky Way, at rapid speeds ...

we obtained a significantly larger 'size' (defined as the half-light radius) for the Milky Way than that expected," the researchers wrote in the paper. The Milky Way is a barred spiral galaxy with ...

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

His measurements marked the end of the Great Debate about the Milky Way’s size and the nature of the nebulae. Hubble wrote about his discovery to Harlow Shapley, who had argued that the Milky ...

His measurements marked the end of the Great Debate about the Milky Way's size and the nature of the nebulae. Hubble wrote about his discovery to Harlow Shapley, who had argued that the Milky Way ...