After Welsh amateur astronomer Isaac Roberts retired from his career in engineering and manufacturing, he devoted his life to imaging the heavens. Using a 20-inch reflector with a 7-inch refractor mounted on the top for tracking, Roberts established a personal observatory in Merseyside and developed techniques for long-exposure astrophotography. From there, on Dec. 29, 1888, Continue reading "Dec. 29, 1888: The Andromeda Galaxy is photographed" The post Dec. 29, 1888: The Andromeda Galaxy is photographed appeared first on Astronomy Magazine .