À partir de la constellation de la Grande Ourse' Johannes Hevelius Prodromus astronomiae, Firmamentum Sobiescianum, sive Uranographia, 1687. La Grande Ourse, également connu sous le nom de la Grande Ourse, est une constellation visible tout au long de l'année dans la plupart de l'hémisphère nord. Il a été
Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.
Ursa major constellation from Johannes Hevelius' Prodromus astronomiae, Firmamentum Sobiescianum, sive Uranographia, 1687. Ursa Major, also known as the Great Bear, is a constellation visible throughout the year in most of the northern hemisphere. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations defined by the International Astronomical Union. It is dominated by the widely recognized asterism known as the Big Dipper or Plough, which is a useful pointer toward north, and which has mythological significance in numerous world cultures. The seven brightest stars of Ursa Major form the asterism known as the Big Dipper in the United States and Canada, or the Plough in the United Kingdom and Ireland. The Hevelius Firmamentum was the first star atlas to rival Bayer's Uranometria in accuracy, utility, innovation, and influence. Hevelius was perhaps the most active observational astronomer of the last half of the seventeenth century. His star atlas is notable for many reasons. It contains 56 large, double page engraved star maps. The star positions for the charts were derived from his own star catalog, based on his own observations, which was first published along with the atlas. It is unique among the Grand Atlases in choosing to depict the constellations as they would appear on a globe, that is, from the outside looking in, rather than from a geocentric point of view, as Bayer and most others adopted.
