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Related to First Point of Aries: right ascension, sidereal time

EQUINOX. The name given to two periods of the year when the days and nights are equal; that is, when the space of time between the rising and setting of the sun is one half of a natural day. Dig. 43, 13, 1, 8. Vide Day.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
The First Point of Aries really was in Aries when it was named roughly 2,000 years ago.
The zero point on the equator (right ascension [0.sup.h]) was chosen to be the first point of Aries, the place where the ecliptic intersects the equator.