Galaxies are astronomical objects composed of billions or even trillions of stars. Our Earth and solar system are just a tiny ...

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

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

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

A trio of astronomers from the University of Tokyo and Niigata University have found what they describe as "peculiar embedded ...

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

Giant radio galaxies (GRGs) are massive, with plasma jets powered by supermassive black holes at their centers, stretching ...

So how well do you know the Milky Way? Let's test your knowledge of our galaxy's size, age, speed and more with the 15 ...

From vibrant star-forming nebulae to supernova explosions, check out these 7 astonishing images of deep space shared by NASA.

The Hubble Space Telescope completes a high-resolution portrait of our galaxy's gorgeous neighbor, which will help scientists better understand our Milky Way.

Watch the mesmerizing Tarantula Nebula video captured by the Hubble telescope, showcasing the most productive star-forming ...

was nearly a million light years away – too remote to be a part of the Milky Way. Hubble’s work opened the door to the study of the universe beyond our galaxy. In the century since Hubble’s ...