Au (redirected from À)

Au, symbol for the element gold.

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astronomical unit (AU)

Length of the semimajor axis of Earth's orbit around the Sun, 92,955,808 mi (149,597,870 km), often defined simply as the average distance from Earth to the Sun. Direct measurement through the parallax method cannot be used for accurate determinations, because the Sun's glare blots out the light of the background stars necessary to make the measurement. The most precise values have been obtained by measuring the distance from Earth to other objects orbiting the Sun. This indirect method requires an accurate proportional mathematical model of the solar system; once the distance to one planet or other object is determined, then the distance to the Sun can be calculated.

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African Union (AU)

African intergovernmental organization. It is the successor to the Organization of African Unity (OAU). The AU was established in 2002 to promote unity and solidarity among African states, spur economic development, and promote international cooperation. The OAU was established in 1963 with similar goals, and during its tenure the group mediated several border disputes on the African continent. More economic in nature and with a stronger mandate to intervene in conflicts, the AU replaced the OAU in 2002. In 2004 the AU's Pan-African Parliament was inaugurated, and the organization agreed to create a peacekeeping force. The AU's headquarters are in Addis Ababa, Eth.

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Au

(chemistry)

gold

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AU

(astronomy)

astronomical unit

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1.	(networking)	au - The two character country code for Australia used in Internet domain names.
2.	(filename extension)	au - audio.