sublunary sphere — noun In geocentric cosmologies, that region of the cosmos from the centre of the Earth to the moon, believed to be comprised of the four classical elements (earth, air, fire and water) and to be subject to generation and corruptio … Wiktionary
On the Heavens — Page one of Aristotle s On the Heavens, from an edition published in 1837 On the Heavens (Greek: Περί ουρανού, Latin: De Caelo or De Caelo et Mundo) is Aristotle s chief cosmological treatise: it contains his astronomical theory and his ideas on… … Wikipedia
Celestial spheres — Not to be confused with celestial sphere. For other uses, see Celestial (disambiguation). Geocentric celestial spheres; Peter Apian s Cosmographia (Antwerp, 1539) … Wikipedia
Spherical Earth — Medieval artistic representation of a spherical Earth with compartments representing earth, air, and water (c. 1400). The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC … Wikipedia
Heliocentrism — Heliocentric redirects here. For the albums, see Heliocentric (Paul Weller album) and Heliocentric (The Ocean Collective album). Heliocentric Universe … Wikipedia
Zodiac — See also: Zodiac (disambiguation) Wheel of the zodiac: This 6th century mosaic pavement in a synagogue incorporates Greek Byzantine elements, Beit Alpha … Wikipedia
Antikythera mechanism — The Antikythera mechanism (main fragment) The Antikythera mechanism ( / … Wikipedia
Aristarchus On the Sizes and Distances — Aristarchus s 3rd century BC calculations on the relative sizes of, from left, the Sun, Earth and Moon, from a 10th century CE Greek copy On the Sizes and Distances (of the Sun and Moon) (Περὶ μεγεθῶν καὶ ἀποστημάτων [ἡλίου καὶ σελήνης]) is… … Wikipedia
Solstice — For other uses, see Solstice (disambiguation). UTC date and time of solstices and equinoxes[1] year Equinox Mar Solstice June Equinox Sept Solstice Dec day time day time day time day time 2004 20 … Wikipedia
Aristarchus of Samos — Aristarchus, or more correctly Aristarchos (Greek: Ἀρίσταρχος, Arístarchos; 310 BC – ca. 230 BC), was a Greek astronomer and mathematician, born on the island of Samos, in Greece. He presented the first known heliocentric model of the solar… … Wikipedia
