perturbing action
11literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
12Laplace–Runge–Lenz vector — Throughout this article, vectors and their magnitudes are indicated by boldface and italic type, respectively; for example, left| mathbf{A} ight| = A. In classical mechanics, the Laplace–Runge–Lenz vector (or simply the LRL vector) is a vector… …
13Normalized Difference Vegetation Index — Negative values of NDVI (values approaching 1) correspond to water. Values close to zero ( 0.1 to 0.1) generally correspond to barren areas of rock, sand, or snow. Lastly, low, positive values represent shrub and grassland (approximately 0.2 to 0 …
14Discovery of Neptune — New Berlin Observatory at Linden Street, where Neptune was discovered observationally. Neptune was mathematically predicted before it was directly observed. With a prediction by Urbain Le Verrier, telescopic observations confirming the existence… …
152012 phenomenon — Part of a series on …
16HEBREW LITERATURE, MODERN — definition and scope beginnings periodization …
17celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …
18John Couch Adams — Infobox Scientist name = John Couch Adams box width = 300px image width = 240px caption = birth date = birth date|1819|06|15 birth place = Laneast, Cornwall, Great Britain death date = death date and age|1892|01|21|1819|06|15 death place =… …
19Formation and evolution of the Solar System — Artist s conception of a protoplanetary disk The formation and evolution of the Solar System is estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud …
20Korn — For other uses, see Korn (disambiguation). Korn …
