How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger BradySan Quentin, California ...

Located 2.5 million light-years away, the majestic Andromeda galaxy appears to the naked eye as a faint, spindle-shaped object roughly the angular size of the full moon. What backyard observers ...

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

This image from Hubble showcases the stars in Andromeda’s giant stellar stream. About a third of the...[+] stars are young: about 6-8 billion years of age, compared to the more typical 11-13 ...

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 ...

Hubble and Curtis hypothesized Andromeda was its own “island universe,” a self-contained system of stars, much like our own Milky Way. At the time, this was an outrageous idea, and was met ...

Hubble's sharp imaging capabilities can resolve more than 200 million stars in the Andromeda galaxy, detecting only stars brighter than our Sun. They look like grains of sand across the beach. But ...

Researchers using the Hubble Space Telescope have mapped out the enormous halo of gas around the nearest major galaxy to us, the Andromeda Galaxy. Skip to main content. Menu ...

SEATTLE — The Hubble Space Telescope has captured an amazing new photo of the Andromeda Galaxy. The new mosaic image represents the sharpest and largest mosaic image of the Milky Way's galactic ...

The Hubble Space Telescope used quasars to make the most precise map of a galactic halo ever and realized that the Andromeda galaxy's influence stretches into that of our own Milky Way.

A Hubble Space Telescope study takes a close look at the dwarf galaxies surrounding Andromeda. Credit: NASA / ESA / J. Dalcanton / B.F. Williams / L.C. Johnson / PHAT team / R. Gendler Surrounding ...

Hubble has detailed the size and structure of Andromeda's gas halo – and found that it’s already bumping up against that of the Milky Way, in advance of a cosmic collision.