Keywords: Uranometria orion-ruler detail.jpg Detailed view of image Image Uranometria orion jpg a print of the copperplate engraving for Johann Bayer's Uranometria 1661 showing the constellation Orion This image is courtesy of the United States Naval Observatory Library http //www usno navy mil/library/rare/rare html who gives explicit permission to use it so long as the attribution is attached PD-Art the credit line U S Naval Observatory Library is attached Old astronomical prints Rulers Artworks missing infobox template |