equant
81Kepler's laws of planetary motion — In astronomy, Kepler s Laws of Planetary Motion are three mathematical laws that describe the motion of planets in the Solar System. German mathematician and astronomer Johannes Kepler (1571–1630) discovered them.Kepler studied the observations… …
82Mercury (planet) — Mercury  ☿ …
83Metonic cycle — Heliocentric Solar System In astronomy and calendar studies, the Metonic cycle or Enneadecaeteris (from Greek words for nineteen years) is a period of very close to 19 years which is remarkable for being very nearly a common multiple of the solar …
84Ptolemy — For others with Ptolemy... names, and history of those names, see Ptolemy (name). Ptolemy An early B …
85Solstice — 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 …
86Scientific mythology — comprises a collection of anecdotes that inform the public understanding of the history of science and the history of technology. Some of these anecdotes are factually established, some are of questionable repute, and some are known to be false… …
87Zodiac — See also: Zodiac (disambiguation) Wheel of the zodiac: This 6th century mosaic pavement in a synagogue incorporates Greek Byzantine elements, Beit Alpha …
88Ulugh Beg — Ulugh Bek Forensic facial reconstruction Born March 22, 1394 Sultaniyeh Died October 27, 1449 Occupation …
89Menelaus of Alexandria — (c. 70–140 CE) was a Greek[1] mathematician and astronomer, the first to recognize geodesics on a curved surface as natural analogs of straight lines. Contents 1 Life and Works 2 Bibliography …
90Counter-Earth — For the Marvel Comics planet, see Counter Earth (comics). The Counter Earth is a hypothetical body of the Solar system first hypothesized by the presocratic philosopher Philolaus to support his non geocentric cosmology, in which all objects in… …
