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Golden Week holidays Name Date Showa Day (昭和の日, Showa no Hi), 2007–present 29 April Constitution Memorial Day (憲法記念日, Kenpō Kinenbi), 1949–present 3 May Greenery Day (みどりの日, Midori no Hi), 2007–present 4 May Children's Day (子供の日, Kodomo no Hi), also known as Boys' Day or the Feast of Banners, traditionally celebrated as Tango no Sekku (端午の節句).
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The High-frequency Active Auroral Research Program ( HAARP) is a University of Alaska Fairbanks program which researches the ionosphere – the highest, ionized part of Earth's atmosphere . The most prominent instrument at HAARP is the Ionospheric Research Instrument (IRI), a high-power radio frequency transmitter facility operating in the high ...
A replica of Luna 9, the first spacecraft to land on the Moon The first image taken of the far side of the Moon, returned by Luna 3As part of human exploration of the Moon, numerous space missions have been undertaken to study Earth's natural satellite.Of the Moon landings, Luna 2 of the Soviet Union was the first spacecraft to reach its surface successfull, intentionally impacting the Moon on ...
Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
1955–1989. Number built. 104. The Lockheed U-2, nicknamed " Dragon Lady ", is an American single- engine, high altitude reconnaissance aircraft operated from the 1950s by the United States Air Force (USAF) and the Central Intelligence Agency (CIA). It provides day and night, high-altitude (70,000 feet, 21,300 meters), all-weather intelligence ...
Coordinated Universal Time ( UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and ...
