It took the world’s largest telescope, painstakingly used by Edwin Hubble, to resolve the question. Measuring distance Mount Wilson looms about 1.7 km above the Los Angeles basin.

Yet, a century ago, its discovery by Edwin Hubble, then an astronomer at Carnegie Observatories, opened humanity's eyes as to how large the universe really is, and revealed that our Milky Way ...

How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger BradySan Quentin, California Cepheids are rare variable stars with periods ranging from about 1 to 120 ...

The original version of this story appeared in Quanta Magazine. Nearly a century ago, Edwin Hubble discovered that the universe is getting larger. Modern measurements of how fast it is expanding ...

And Hubble's discoveries have spawned more than 21,000 peer-reviewed science papers. The James Webb Space Telescope, which orbits the sun, has captured much space news attention, but it certainly ...

Edwin Hubble was young and ambitious. At the of age 30, he arrived at Mount Wilson Observatory in Southern California just in time to use the new Hooker 100-inch telescope, at the time the largest ...

Other galaxies were considerably farther into the cosmos. Astronomer Edwin Hubble at Mount Wilson around 1925. (Henry E. Huntington Library) Today, we take it for granted that the universe is immense.

Hubble, for whom the Hubble Space Telescope is named, lived in the neighborhood in the early 1900s.

For 35 years, the Hubble Space Telescope has taken photos of celestial objects across the universe. Look back at 10 photos taken by the telescope orbiting above Earth's surface.

This new image showcases NGC 346, a dazzling young star cluster in the Small Magellanic Cloud. ESA/Hubble & NASA, A. Nota, P. Massey, E. Sabbi, C. Murray, M. Zamani (ESA/Hubble) This month sees a ...

To celebrate the Hubble telescope's 35th anniversary, NASA released some striking new images on Wednesday, including a bold rendition of Mars and a stunning photo of a moth-shaped nebula with a ...