In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

STARGAZERS are in for a treat this month as a rare planet parade falls in Andromeda galaxy season. “One of the best planet ...

Reach for the stars with our guide to the best dark-sky reserves on the planet, from the French Pyrenees to the Atacama ...

Reach for the stars with our guide to the best dark-sky reserves on the planet, from the French Pyrenees to the Atacama ...

In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...

Astronomers spent a decade compiling this special image with the Hubble Space Telescope and then stitched together 600 photos to showcase over 200 million stars.

Hubble’s work pushed the field of astronomy forward, starting with his paper demonstrating that some objects exist outside ...

"One of the best planet parades in almost half a century" will seen Mars, Jupiter, Saturn, and Venus all light up the night ... Andromeda, which is about twice the size of the Milky Way.

October belongs to Pegasus and the water constellations, which float through the southern sky after nightfall. Reigning supreme high in the south are the Great Square of Pegasus and, stretching from ...

But only one galaxy stands out as the most important nearby stellar island to our Milky Way ... Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear autumn night ...

Possibly one of the best-known constellations in the northern sky, Ursa Major—or the Great Bear—contains an asterism of seven ...