libration definition

  • noun:
    • A very sluggish oscillation, real or evident, of a satellite as viewed through the larger celestial body around which it revolves.
    • The act of librating.
    • The apparent wobble or difference within the noticeable side of the Moon that permanently deals with our planet, permitting observers on the planet to see, over a period of time, slightly over fifty percent for the lunar surface.
    • A similar rotational or orbital characteristic of various other celestial human body.
    • The act or condition of librating.
    • a proper or apparent libratory motion, like this of a balance before visiting remainder.
    • The work of librating or balancing, or even the condition of being balanced; a state of equipoise; stability.
    • In astronomy, a proper or obvious libratory or oscillating movement, like that of a balance before coming to sleep.
    • libration in latitude, in consequenoe of the woman axis becoming inclined towards the plane of her orbit, so occasionally certainly one of the woman poles and often the other decreases, whilst were, or dips toward the planet earth
    • diurnal libration, that is merely due to the lunar parallax. Within the last situation, an observer on area associated with planet perceives points nearby the upper edge of the moon's disk, during the time of her rising, which vanish as the woman height is increased; while new people in the opposite or reduced edge, that have been before hidden, come into view as she descends toward the horizon. If observer had been placed at planet's center he'd view no diurnal libration.
    • (astronomy) a genuine or obvious sluggish oscillation of a moon or satellite

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