first point of Libra

first point of Libra

See first point of Aries.

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

first point of Libra

[¦fərst ¦pȯint əv ′lē·brə]

(astronomy)

autumnal equinox

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

first point of Libra

The point of intersection of the ecliptic and the celestial equator (equinoctial) when the sun is moving from the north to the south direction. It is denoted by the symbol λ. Also called autumnal equinox. * See first point of Aries and ecliptic.

An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved