NASA's Hubble Traces Hidden History of Andromeda Galaxy
Space Telescope Science Institute (STScI)This panoramic view of the Andromeda galaxy, located 2.5 million light-years away, is the largest photomosaic ever assembled from Hubble Space Telescope observations. It took more than 10 years to collect data to make this vast and colorful portrait of the galaxy, built from more than 600 overlapping snapshots. This stunning mosaic captures the pinpoint glow of 200 million stars spread across 2.5 billion pixels.