Canis Major constellation, 1603
{"Image ImageDescription": "Canis Major constellation. 17th century engraving of Canis Major (the Greater Dog), overlaid with the positions of the stars that make up this constellation. This star map is from Uranometria, a star atlas published in 1603 by the German astronomer Johann Bayer. It contained a total of 51 star maps, plotted using the most accurate observations of the time. It was the first star atlas to use reference grids on its maps, and the first to use Greek letters to identify individual stars, though it retained the traditional mythological depictions of the constellations.", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image YCbCrPositioning": "Centered", "Image Copyright": "Science Photo Library"}