• Peg - Pegasus the Flying Horse


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    Intro and Visual description

    Farther along on the line from the Pointers to Polaris and Cassiopeia is a large, nearly perfect square of four stars. This is the Great Square of Pegasus. Pegasus, the Winged Horse, lies almost directly overhead in autumn. Located east of Andromeda; signals the coming of Fall. Because Pegasus flies so fast, his hind quarters can’t be seen.

    Pegasus is included in the ancient star catalogs of Eudoxos of Knidos, Aratos of Soli, and Ptolemy.



    Skylore and Literature:  See Andromeda and Perseus.

  • Fusion Image 9

    Source: Johann and Elisabeth Hevelius, Uranographia ("Map of the Heavens"; Gdansk, 1690); History of Science Collections, University of Oklahoma Libraries
    Object: M15, in Sagittarius the Archer; Hubble Space Telescope, WikiSky
    Composite: The Sky Tonight, (CC-by)
    Fusion Image 9

    Constellations IAU Abbr


    Source Description

    The Uranographia of Hevelius, the most detailed and influential celestial atlas of the 17th century, contains 54 beautiful double-page engraved plates of 73 constellations, and 2 oversized folding plates of planispheres.

    Unique among the major star atlases, Hevelius depicted the star patterns as if from the outside looking in, not as seen when looking up into the night-time sky. Consequently, Hevelius’ constellation figures provided an influential model for the production of artfully-designed celestial globes.

    The full title of the Uranographia pays tribute to the Polish king, John III Sobiesci. Hevelius created a new constellation, Scutum, the “Shield of Sobiesci,” representing the king’s defense of Europe against the Turks.

  • Fusion Image 10

    Source: Johann Bayer, Uranometria ("Measuring the Heavens"; Ulm, 1661); History of Science Collections, University of Oklahoma Libraries
    Object: NGC 7331 in Pegasus the Flying Horse; Vicent Peris (CC-by-sa)
    Composite: The Sky Tonight,, CC-by-sa)
    Fusion Image 10

    Constellations IAU Abbr


    Source Description

    First published in Augsburg in 1603, Bayer’s atlas consists of 51 double-page copperplate engravings. Bayer labeled the stars with Greek letters, according to their apparent magnitude.