On Oct. 4, 1923, Edwin Hubble took a photographic plate of the Andromeda Nebula (as it was known then) using the 100-inch Hooker telescope at Mount Wilson. The next night, Oct. 5th, he took another ...

Cepheids are rare variable stars with periods ranging from about 1 to 120 days. Their light curve — a chart showing brightness over time — is characterized by rapid brightening followed by slow ...

Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. The Andromeda galaxy is the galaxy next door, a very faint, fuzzy thing ...

It might be old, bits of it might go offline with increasing regularity, but Hubble still does cutting edge science as this enormous portrait of Andromeda shows. Pop quiz: how old is the Hubble Space ...

This is the largest photomosaic ever assembled from Hubble Space Telescope observations. It is a panoramic view of the neighboring Andromeda galaxy, located 2.5 million light-years away. It took over ...

Add Yahoo as a preferred source to see more of our stories on Google. (Credit: NASA/ESA) It's been 35 years since Hubble came online, so in honor of the intrepid telescope's 35th anniversary, we've ...

The full image includes some 2.5 billion pixels compiled from observations spanning more than 1,000 orbits around Earth Margherita Bassi - Daily Correspondent A section of the new photomosaic of the ...

The Andromeda galaxy is the galaxy next door, a very faint, fuzzy thing in the night sky, larger than a full moon. Textbooks claim it’s visible to the naked eye. Most of us have never noticed it. Too ...

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...