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Что (кто) такое Newtonian$52583$ - определение
TYPE OF REFLECTING TELESCOPE
Newtonian Telescope; Newtonian reflector; Newton telescope; Newtonian Reflector; Newtonian reflectors
Post-Newtonian expansion
APPROXIMATION OF GENERAL RELATIVITY
Post-Newtonian; Post-Newtonian approximation; Post-Newtonian analysis; Post-Newtonian formalism; PN expansion; Bardeen potentials; Bardeen potential; Bardeen Potential
In physics, precisely in the theory of general relativity, post-Newtonian expansions (PN expansions) are used for finding an approximate solution of the Einstein field equations for the metric tensor. The approximations are expanded in small parameters which express orders of deviations from Newton's law of universal gravitation.
Newtonian
WIKIMEDIA DISAMBIGUATION PAGE
Newtonian (disambiguation)
¦ adjective
1. Physics relating to or arising from the work of the English scientist Sir Isaac Newton (1642-1727).
2. Astronomy denoting a reflecting telescope with a secondary mirror set at 45° to deflect the light from the main mirror to the eyepiece.
Newtonian
WIKIMEDIA DISAMBIGUATION PAGE
Newtonian (disambiguation)
·noun A follower of Newton.
II. Newtonian ·adj Of or pertaining to Sir Isaac Newton, or his discoveries.
Википедия
Newtonian telescope
The Newtonian telescope, also called the Newtonian reflector or just a Newtonian, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton, using a concave primary mirror and a flat diagonal secondary mirror. Newton's first reflecting telescope was completed in 1668 and is the earliest known functional reflecting telescope. The Newtonian telescope's simple design has made it very popular with amateur telescope makers.
