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 ...

Hubble’s work pushed the field of astronomy forward, starting with his paper demonstrating that some objects exist outside ...

As fascinating as this thought is, for those living in the hustle and bustle of the city, the night sky often feels empty ... clear views of the Milky Way Galaxy. Known for its unique rock ...

Hubble's work opened the door to the study of the universe beyond our galaxy ... Milky Way was composed of a huge number of faint stars. For the next 300 years, astronomers assumed that the Milky Way ...

Sliding version. Dark blue starry night sky. Loopable Universe filled with stars, nebula and galaxy milky way sky stock videos & royalty-free footage Starry milky way constellations motion and falling ...

Macro close up. Slow motion. Magic blue night sky with million stars of milky way galaxy and sunrise in winter mountains nature Night to Day Time lapse Magic blue starry night sky with million stars ...

The evening launch provided ideal conditions for the setting sun to light up the rocket's expanding engine plume against the darkening sky ... galaxy, which measures 2.5x larger than the Milky Way.

The magnificent Andromeda galaxy (Messier 31), stands out as the most important nearby stellar island to our Milky Way, and can be seen with the naked eye on a clear autumn night as “a faint ... much ...

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 ...

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

But what of smaller astronomical bodies, like the Large Magellanic Cloud, a dwarf satellite galaxy that is expected to collide with the Milky Way in 2.4 billion years? Nobody is quite sure whether ...

The Bullseye galaxy is two and a half times the size of our Milky Way and has nine rings. Fifty million years ago, two galaxies met up in space. One was tiny, the other large. The small galaxy ...