Phases of the Moon, from "The Celestial Atlas, or the Harmony of the Universe"

The Sun in His Chariot and the Signs of the Zodiac, Illustration from Ptolemy's Tetrabiblos, 820 AD

Celestial Planisphere Showing the Signs of the Zodiac

Astronomers Looking Through a Telescope, Detail from a Map of the Constellations

Earth

Horizon

Galileo Galilei Demonstrates His Astronomical Theories to a Monk

Ptolemaic System, from "The Celestial Atlas, or the Harmony of the Universe"

Dancers

Sphere of World II

Astrological Table of the Sun, from the "Book of Good and Bad Fortune"

Astrolabe, 1216

Astrolabe

Moorish Astrolabe, from Cordoba, 1054

Armillary Sphere Made on the Ptolemaic System by Adam Heroldt, Rome, 1648

The Berselius Astrolabe, Late 14th, 15th

Chart Describing the Movement of the Planets, from a Celestial Atlas, or the Harmony of the Universe

The Conjunction of the Planets, from "The Celestial Atlas, or the Harmony of the Universe"

Constellation of Capricorn, from "Uranometria"

Constellation of Hercules Lion's Pelt

Constellation of Libra from "Uranometria"

Constellation of Orion from "Uranometria"

Auriga, the Constellation of the Northern Hemisphere, from "Uranometria"

Constellation of Pisces from "Uranometria"

Perseus with the Head of Medusa, from "Uranometria"

Constellation of Cygnus, from "Uranometria"

A Group of Constellations from "Uranometria"

Constellation of Ophiuchus Group, from "Uranometria"