If we could go back 101 years, we would encounter a time when scientists still thought the Milky Way was the entirety of our ...

For humans, the most important star in the universe is our sun. The second-most important star is nestled inside the ...

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

Yet, a century ago, its discovery by Edwin Hubble opened humanity's eyes as to how large the universe really is, and revealed that our Milky Way galaxy is just one of hundreds of billions of ...

The full image includes some 2.5 billion pixels compiled from observations spanning more than 1,000 orbits around Earth ...

Circa 1945: Astronomer Dr. Edwin Powell Hubble sitting in a chair at a desk reading a journal. A staff member at Mt. Wilson Observatory, he was the first scientist to offer observational evidence ...

According to historical records, we have one man to thank for this: Edwin Hubble. That's certainly partly the truth, but he couldn't have done it without the genius of others around him who paved ...

Edwin Hubble's discovery of a Cepheid variable star in the Andromeda galaxy in 1923 revealed that the universe extends far beyond the Milky Way, fundamentally altering our understanding of the cosmos.

In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100 years ago, astronomers partnered with the American Association of ...

A century ago, Edwin Hubble first established that this so-called 'spiral nebula' was actually very far outside our own Milky Way galaxy -- at a distance of approximately 2.5 million light-years ...