aberration of position
51Télescope — Pour les articles homonymes, voir Télescope (homonymie). Un télescope, (du grec τηλε (tele) signifiant « loin » et σκοπεῖν (skopein) signifiant « regarder, voir »), est un instrument d optique permettant d augmenter la… …
52telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …
53Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …
54MICROSCOPIE — La révolution qui consiste, à la fin du XVIe siècle, à regarder «à la loupe» non plus directement un objet, mais son image agrandie est à l’origine de la microscopie. L’étymologie (du grec mikros , petit, et skopein , examiner) renvoie à l’examen …
55Adaptive optics — (AO) is a technology used to improve the performance of optical systems by reducing the effects of rapidly changing optical distortion. It is used in astronomical telescopes and laser communication systems to remove the effects of atmospheric… …
56Homosexuality and Bahá'í Faith — The Bahá í Faith teaches that the only acceptable form of sexual expression is within marriage, and Bahá í marriage is defined in the religion s texts as exclusively between one man and one woman. Bahá í law restricts permissible sexual… …
57Abbildungsfehler — In der Optik versteht man unter Abbildungsfehlern oder Aberrationen Abweichungen von der idealen optischen Abbildung durch ein optisches System wie etwa ein Foto oder Fernrohr Objektiv oder ein Okular, die ein unscharfes oder verzerrtes Bild… …
58Bradley, James — ▪ English astronomer born March 1693, Sherborne, Gloucestershire, Eng. died July 13, 1762, Chalford, Gloucestershire English astronomer who in 1728 announced his discovery of the aberration of starlight, an apparent slight change in the… …
59Newtonian telescope — The Newtonian telescope is a type of reflecting telescope invented by the British scientist Sir Isaac Newton (1642–1727), using a concave primary mirror and a flat diagonal secondary mirror. Newton’s first reflecting telescope was completed in… …
60physical science — physical scientist. 1. any of the natural sciences dealing with inanimate matter or with energy, as physics, chemistry, and astronomy. 2. these sciences collectively. [1835 45] * * * Introduction the systematic study of the inorganic world …
