precession period
81Constellation — This article is about the star grouping. For other uses, see Constellation (disambiguation). The constellation Orion is one of the most recognizable in the night sky. In modern astronomy, a constellation is an internationally defined area of the… …
82CryoEDM — is a particle physics experiment aiming to measure the electric dipole moment (EDM) of the neutron to a precision of 10 28ecm.[1] The name is an abbreviation of cryogenic neutron EDM experiment. The previous name nEDM is also sometimes used, but… …
83Philosophiæ Naturalis Principia Mathematica —   Title page of Principia , first edition (1687) Original title …
8410 Hygiea — 10 Hygiea   …
85great year — noun time required for one complete cycle of the precession of the equinoxes, about 25,800 years • Syn: ↑Platonic year • Hypernyms: ↑time period, ↑period of time, ↑period * * * noun Etymology: Middle Eng …
86Sidereal year — The sidereal year is the time taken for the Sun to return to the same position with respect to the stars of the celestial sphere. It is the orbital period of Earth, equal to 365.25636042 mean solar days (31,558,149.540 seconds), that is… …
87Aristarchus 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… …
88SS 433 — Artist s impression of SS 433 Observation data Epoch J2000.0       …
89Magnetic Surveying in Archaeology (book) — Magnetic Surveying in Archaeology (Wormianum, 2008, ISBN 978 87 89531 29 8) is a book written by Russian archaeologist T. N. Smekalova together with O. Voss and S. L. Smekalov. In the book researches collected information about magnetic… …
90model — by Gary Genosko Baudrillard s thinking about models had two distinct phases. The first belonged to the period of The System of Objects (1996a [1968]) in which he worked through the difference between models and series; the second emerged in… …
