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

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

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

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 ...

There’s really no reason you can’t use binoculars to look into space – and in fact astronomers have been working on doing so ...

A bouquet of thousands of stars in bloom has arrived. This composite image contains the deepest X-ray image ever made of the ...

A nebula that neighbors the Milky Way galaxy happens to be a powerhouse of forging stars, "a bouquet of thousands of stars in ...

If you're looking for a way to tell someone that they are out of this world this Valentine's day, maybe look up ...

Einstein predicted that massive objects bend light as it passes through their gravitational field. This week, a new telescope ...

This image of the Andromeda Galaxy, captured by the Herschel Space Observatory, reveals a detailed view of cool lanes of star formation. Located 2.5 million light-years from Earth, it is a key member ...

Scientists predict Andromeda and the Milky Way will collide in about 4.5 billion years—reshaping the night sky forever!.