Sometimes a picture is worth much more than a thousand words:
Andromeda Galaxy Panorama Features Over 200 Million Stars
Stitching together more than 600 overlapping snapshots, the panorama serves as the largest photomosaic ever assembled from Hubble Space Telescope observations. Across its 2.5 billion pixels are a vast and vibrant assortment of 200 million stars, a mere fraction of Andromeda’s entire population. Taken in its entirety, the panorama is not only a technological or photographic achievement, it’s also a critical glimpse into the Andromeda galaxy itself.
And here’s the video version.
Andromeda revealed!
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J.R. Johnson 
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