Ancient Greek theories on the Milky Way galaxy ranged from mythology to science, with ideas from Democritus, Aristotle and ...

Scientists observing the Centaurus galaxy cluster made an exciting breakthrough by discovering powerful streams of hot gas ...

and it also interacts with its buddy dwarf galaxy, the Small Magellanic Cloud. Those interactions shake up the stars and gas and make it hard to locate the center. Now, though, astronomers have a ...

A mysterious phenomenon at the center of our galaxy could be the result of a ... which pass through regular matter without much interaction—making them extremely hard to detect.

Fluffy strands of cosmic gas and dust illuminated by bright young stars form a beautiful cloudscape in a neighboring nebula.