- gravitational lensing
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The action of a star that acts as a gravitational lens and focusses starlight from another star that passes behind it as observed from the Earth
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gravitational lensing
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Gravitational lensing formalism — In general relativity, a point mass deflects a light ray with impact parameter b by an angle hat{alpha} = frac{4GM}{c^2b}. A naïve application of Newtonian gravity can yield exactly half this value, where the light ray is assumed as a massed… … Wikipedia
gravitational lensing — noun : the bending and focusing of light and especially the formation of multiple images of a more distant object by a celestial object acting as a gravitational lens … Useful english dictionary
gravitational lensing — /ˌgrævəteɪʃənəl ˈlɛnzɪŋ/ (say .gravuhtayshuhnuhl lenzing) noun Astronomy the change effected in the path of light from a distant object by the force of gravity exerted by a massive object, as a star or galaxy …
Weak gravitational lensing — While the presence of any mass bends the path of light passing near it, this effect rarely produces the giant arcs and multiple images associated with strong gravitational lensing. Most lines of sight in the universe are thoroughly in the weak… … Wikipedia
Strong gravitational lensing — is a gravitational lensing effect that is strong enough to produce multiple images, arcs, or even Einstein rings. Generally, the strong lensing effect requires the projected lens mass density greater than the critical density Sigma {cr},. For… … Wikipedia
Optical Gravitational Lensing Experiment — OGLE telescope at the Las Campanas Observatory … Wikipedia
Optical Gravitational Lensing Experiment — 29° 00′ 36″ S 70° 41′ 56″ W / 29.010, 70.699 … Wikipédia en Français
Optical Gravitational Lensing Experiment — (OGLE, буквально Оптический Эксперимент по Гравитационному Линзированию) польско американский астрономический проект по изучению темной материи при помощи метода гравитационного микролинзирования. Проект был основан в 1992, под руководством … Википедия
Gravitational lens — Gravitational Lensing Formalism Strong lensing … Wikipedia
Gravitational microlensing — Gravitational Lensing Formalism Strong lensing … Wikipedia
