Bayer,

Bayer, JOHANN, a German constructor of charts of the stars, was born in 1572, at Rhain, in Bavaria, and died an advocate at Augsburg in 1625. His zeal for the Protestant Church was so conspicuous that he was commonly called Os Protestantium ('the Mouth of the Protestants'). His contributions to astronomy are contained in his Uranometria (1603), in which he gave 51 maps of the heavens, constructed from the observations of his predecessors, and followed by explanations in his Explicatio (1654).