ONLINE PH OTO GALLE RY Over the course of two weeks in November 2014, photographer Brian Ottum collected 25 hours' worth of images to create this stunning three-panel mosaic of Andromeda Galaxy and its surroundings. "I had never done a big mosaic before," Ottum says a year and a half later, "so I did not have the courage to process until this week."http://www.skyandtelescope.com?utm_source=GD&utm_medium=di&utm_campaign=GDstdiJuly16 http://www.skyandtelescope.com/skytel http://www.skyandtelescope.com/astronomy-blogs?utm_source=GD&utm_medium=di&utm_campaign=GDstdiJuly16 http://www.skyandtelescope.com/astronomy-pictures?utm_source=GD&utm_medium=di&utm_campaign=GDstdiJuly16 http://www.skyandtelescope.com/skytel http://www.skyandtelescope.com/astronomy-blogs?utm_source=GD&utm_medium=di&utm_campaign=GDstdiJuly16 http://www.skyandtelescope.com/sky-and-telescope-magazine/beyond-the-printed-page/hercules-galaxy-cluster/?utm_source=GD&utm_medium=di&utm_campaign=GDstdiJuly16 http://www.skyandtelescope.com/astronomy-blogs/explore-night-bob-king/?utm_source=GD&utm_medium=di&utm_campaign=GDstdiJuly16 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