For units in astronomy, see astronomical system of units. The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year.
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La Taza de la Excelencia, as it is known in Spanish in other Central American countries, is more of a tool for roasters to publicize themselves on the international market, than a chance to get a good price, said John la Cerda, a representative of the company that owns the El Socorro y Annexos farm, which won first place in 2011.