In the heart of our Milky Way galaxy, two gigantic "bubbles" extend roughly 50,000 light-years above and below the galactic ...

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

Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

The materials that make up your body are intergalactic voyagers that have existed beyond the limits of the Milky ... way around" the galaxy before coming together to make up our bodies here on Earth.

ESA’s decade-long Milky Way Gaia mapping mission still has tons of data to release over the next few years. Expect surprises.

Image: CfA/Mel Weiss Astronomers have detected a mid-infrared flare from the supermassive black hole at the heart of the Milky Way galaxy for the ... chance of striking Earth in just seven years.

Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position ... away a galaxy was, the faster it was moving away from Earth.

New research suggests that the carbon that serves as the building blocks of life "took the long way around" the galaxy before coming together to make up our bodies here on Earth. Instead ...

The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images ...