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 ...

A star has been spotted shooting away from the heart of our galaxy at around 500 kilometres per second, giving astronomers ...

a small satellite galaxy of the Milky Way. It is one of the biggest red supergiants, the largest stars we know of. These are massive, cool stars that have run out of hydrogen fuel in their core ...

"Black holes are so stealthy that this one has been practically under our noses this whole time." ...

At the edge of the Milky Way, there are a surprising number of hyper-fast stars that originate from outside. They apparently betray a supermassive black hole.

Astronomers have discovered strong evidence for the closest supermassive black hole outside of the Milky Way galaxy. This ...

In 1610, astronomer Galileo Galilei used the newly invented telescope to show that the Milky Way was composed of a huge number of faint stars ... at the time the largest in the world.

The most widely accepted theory of galactic evolution holds that supermassive black holes are found only in the largest ... Within the Milky Way itself there are hypervelocity stars that probably ...

The Large Magellanic Cloud is a dwarf galaxy residing near our Milky Way, visible to the naked eye as a luminous patch of ...