Astronomical tables [electronic resource] : shewing the declinations, right ascentions, and aspects of three hundred sixty five of the most principall fixed stars and the number of them in their constellations after Aratus : as also the true oblique ascentions and descentions of all the said stars upon the cusps of every of the twelve houses of heaven according to their latitude / first invented by George Hartgill ; and now reduced to this our age by John and Timothy Gadbury.