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• Timeline of telescope technology — Timeline of telescope technology* c.2560 BC c.860 BC Egyptian artisans polish rock crystal, semi precious stones, and latterly glass to produce facsimile eyes for statuary and mummy cases. The intent appears to be to produce an optical illusion.… …   Wikipedia

• Sky-Watcher — Infobox Company company type = Corporation foundation = 1980 location city = Richmond, British Columbia location country = Canada industry = Technology company slogan = For people curious enough to look up and wonder. homepage = http://www.sky… …   Wikipedia

• Discovery 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… …   Wikipedia

• Meade Instruments — For other uses, see Meade (disambiguation). Meade Instruments Corporation Type Public (NASDAQ: MEAD) Founded 1972 …   Wikipedia

• Newtonian 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… …   Wikipedia

• Maksutov telescope — A 150mm aperture Maksutov Cassegrain telescope. The Maksutov is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly spherically… …   Wikipedia

• Lens (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 …   Wikipedia

• Snell's law — In optics and physics, Snell s law (also known as Descartes law, the Snell–Descartes law, and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other… …   Wikipedia

• Roger Joseph Boscovich — Infobox Scientist caption=Portrait by Robert Edge Pine, London, 1760. dead=dead birth date=birth date|1711|5|18 birth place = Dubrovnik, Republic of Ragusa death date=death date|1787|2|13 death place = Milan, Duchy of Milan residence = Milan… …   Wikipedia

• Blazar — A blazar is a very compact and highly variable energy source associated with a presumed supermassive black hole at the center of a host galaxy. Blazars are among the most violent phenomena in the universe and are an important topic in… …   Wikipedia

• Photoreceptor cell — This article is about cellular photoreceptors. For other types of photoreceptors, see Photoreceptor (disambiguation). Rods and cones redirects here. For the Blue Man Group song, see Rods and Cones (song). Neuron: Photoreceptor Cell …   Wikipedia