The Andromeda galaxy is a colossal marvel in our sky, hosting over 1 trillion stars. Now, astronomers have used the Hubble Space Telescope to capture hundreds of detailed images of our vast galactic neighbor, creating the largest-ever photomosaic of the galaxy. It took over 10 years to create.

NASA's Hubble Space Telescope reveals stunning details about the Andromeda galaxy, shedding light on its complex evolution, stellar population, and merger history.

Messier 31 is located 2.5 million light-years away from Earth and was a much bigger target in the sky than the galaxies Hubble routinely observes.

Andromeda is the closest large galaxy to the Milky Way. And it is getting closer, as the two will merge in several billion years. It has been an object of study for centuries, but we have never seen it like this.

The Andromeda Galaxy, 2.5 million light-years away, is unveiled in Hubble's largest photomosaic. Spanning a decade, this 2.5-billion-pixel image reveals 200 million stars and Andromeda’s dynamic history.