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  • 2006 O'Hare International Airport UFO sighting — The Chicago O Hare UFO sighting occurred on November 7, 2006, when people at Chicago O Hare International Airport reported seeing a saucer or disc shaped UFO. Contents 1 The sighting 2 Reaction from the Federal Aviation Administration and United… …   Wikipedia

  • Heliograph — A Heliograph (from the Greek helios (Lang el| Ἥλιος), meaning sun , and (γραφειν) = write) is a wireless solar telegraph that signals using Morse code flashes of sunlight reflected by a mirror. The flashes are produced by momentarily pivoting the …   Wikipedia

  • Osborne Fire Finder — An Osborne Fire Finder device used in fire lookout towers. The Osborne Fire Finder is a type of alidade used by fire lookouts in order to find a directional bearing (azimuth) to smoke in order to alert fire crews to a wildland fire. Contents …   Wikipedia

  • Hipparchus — (Greek polytonic|Ἵππαρχος; ca. 190 BC ndash; ca. 120 BC) was a Greek astronomer, geographer, and mathematician of the Hellenistic period.Hipparchus was born in Nicaea (now Iznik, Turkey), and probably died on the island of Rhodes. He is known to… …   Wikipedia

  • Diopter sight — Target shooting diopter of a 10 metre air rifle with a mounted occluder for the non aiming eye The diopter is an aperture sight component used to assist the aiming of a guns/devices, usually those intended to launch projectiles, such as firearms …   Wikipedia

  • Iron sight — Sight picture through iron sights of an H K MP5 submachine gun. The annular shroud around the front post sight is aligned with the rear peep sight to ensure the weapon is properly trained. Iron sights are a system of shaped alignment markers… …   Wikipedia

  • Kenneth Arnold — Infobox Person name = Kenneth A. Arnold image size = 175px caption = Showing a drawing of the crescent shaped object birth date = birth date|1915|03|29 birth place = Sebeka, Minnesota death date = death date and age|1984|01|16|1915|03|29 death… …   Wikipedia

  • Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium

  • Battle of the Coral Sea — Part of the Pacific Theater of World War II …   Wikipedia

  • M16 rifle — Rifle, 5.56 mm, M16 From top to bottom: M16A1, M16A2, M4A1, M16A4 Type Assault rifle Place  …   Wikipedia

  • George Mallory — George Herbert Leigh Mallory George Mallory Born 18 June 1886(1886 06 18) Mobberley, Cheshire, England Died …   Wikipedia

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