Take a deep breath: the universe is not just big it’s mind-bogglingly, practically scandalously huge. And it’s growing. A ...

The idea that the universe is expanding was first proposed by Edwin Hubble in the late 1920s and has been repeatedly backed ...

The Andromeda galaxy is also known as Messier 31. It is a spiral galaxy located about 2.5 million light-years from Earth. On ...

Edwin Hubble uses the telescope at the Mount Wilson Observatory. Photo by Ann Ronan Pictures/Print Collector/Getty Images Print Collector. Estimating distances in astronomy is challenging.

Edwin Hubble Papers/Courtesy of Huntington Library, San Marino, Calif. In the 1920s, Edwin Hubble was working with the 100-inch Hooker telescope on Mount Wilson, just outside Los Angeles.

However, although photons of light existed since the first second after the Big Bang, they could not yet shine across the ...

In short, Edwin Hubble is the man who wiped away the ancient universe and discovered a new universe that would shrink humanity's self-perception into being an insignificant speck in the cosmos.

But Edwin Hubble suspected there was so much more. Hubble, who would have turned 127 years old this year, was perplexed by Andromeda, a fuzzy spiral region in the night sky.

On Oct. 4, 1923, astronomer Edwin Hubble trained his telescope onto the sky and snapped a photo of a speck of light within the cloudy M31, also known as the Andromeda galaxy. Hubble initially thought ...

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 ...

In the 1920s, Edwin Hubble was working with the 100-inch Hooker telescope on Mount Wilson, just outside Los Angeles. At the time, it was the largest telescope in the world. On a chilly evening, I ...