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This the largest photomosaic ever assembled from NASA\/ESA Hubble Space Telescope observations. It is a panoramic view of the neighbouring Andromeda galaxy, located 2.5 million light-years away. It took over 10 years to make this vast and colorful portrait of the galaxy, requiring over 600 Hubble snapshots. The galaxy is so close to us, that in angular size it is six times the apparent diameter of the full Moon, and can be seen with the unaided eye. For Hubble\u2019s pinpoint view, that\u2019s a lot of celestial real estate to cover. This stunning, colorful mosaic captures the glow of 200 million stars. That\u2019s still a fraction of Andromeda\u2019s population. And the stars are spread across about 2.5 billion pixels. The detailed look at the resolved stars will help astronomers piece together the galaxy\u2019s past history that includes mergers with smaller satellite galaxies.<\/p>\n
[Image description: The Andromeda galaxy, a spiral galaxy, spreads across the image. It is tilted nearly edge-on to our line of sight so that it appears very oval. The borders of the galaxy are jagged because the image is a mosaic of smaller, square images against a black background. The outer edges of the galaxy are blue, while the inner two-thirds is yellowish with a bright, central core. Dark, dusty filamentary clouds wrap around the outer half of the galaxy\u2019s disk. At 10 o\u2019clock, a smaller dwarf elliptical galaxy forms a fuzzy, yellow blob. Hubble\u2019s sharp vision distinguishes about 200 million stars within the image.]<\/p>\n
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