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Angular Momentum , angular momentum The momentum of a body rotating in a plane around a point. It is formally the product of the mass of the body, the radius of the orb… Equinox , Equinox
The Latin meaning of the word “equinox” is “equal night,” referring to those two moments in the year when day and night are equal in length.… Node , node / nōd/ • n. 1. a point at which lines or pathways intersect or branch; a central or connecting point. ∎ Comput. a piece of equipment, such as a… Aristarchus Of Samos , Aristarchus of Samos
Aristarchus of Samos
(ca. 310–230 b.c.)
mathematics, astronomy.
Aristarchus is celebrated as being the first man to have propoun… apsis , ap·sis / ˈapsis/ • n. (pl. -si·des / -siˌdēz/ ) either of two points on the orbit of a planet or satellite that are nearest to or furthest from the b… Ecliptic , e·clip·tic / iˈkliptik/ • n. Astron. a great circle on the celestial sphere representing the sun's apparent path during the year, so called because l…
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