While mapping the nearby universe, astronomers discovered the largest-known structure in the universe, about 425 million to ...

The Tarantula Nebula, also known as 30 Doradus, is revealed in an unusual light in this exceptionally deep Chandra X-ray ...

This image was created by combining data from three major observatories: NASA’s Chandra X-ray Observatory, the Hubble Space ...

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 ...

New findings explain the Phoenix cluster's mysterious starburst. Data confirm the cluster is actively cooling and able to generate a huge amount of stellar fuel on its own.

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

Fast-moving stars zooming through our galaxy might have been slingshotted from a black hole inside the neighbouring Large ...

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

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

Enabled by supercomputing, University of Pretoria (UP) researchers have led an international team of astronomers that has ...

Astronomers have identified what they believe to be the largest structure in the universe to date. Named "Quipu" after the ancient Incan method of record-keeping, this colossal superstructure ...

It is not surprising that there are regions that are more densely populated by galaxies, and regions that are less populated.