LIBRATION OF THE MOON

Definition: LIBRATION OF THE MOON

LIBRATION OF THE MOON

1. Any one of those small periodical changes in the position of the moon's surface relatively to the earth, in consequence of which narrow portions at opposite limbs become visible or invisible alternately. It receives different names according to the manner in which it takes place; as: (a) Libration in longitude, that which, depending on the place of the moon in its elliptic orbit, causes small portions near the eastern and western borders alternately to appear and disappear each month. (b) Libration in latitude, that which depends on the varying position of the moon's axis in respect to the spectator, causing the alternate appearance and disappearance of either pole. (c) Diurnal or parallactic libration, that which brings into view on the upper limb, at rising and setting, some parts not in the average visible hemisphere.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Crosswords: LIBRATION OF THE MOON

4C 49 42 52 41 54 49 4F 4E      4F 46      54 48 45      4D 4F 4F 4E

01001100 01001001 01000010 01010010 01000001 01010100 01001001 01001111 01001110 00100000 01001111 01000110 00100000 01010100 01001000 01000101 00100000 01001101 01001111 01001111 01001110

&#76 &#73 &#66 &#82 &#65 &#84 &#73 &#79 &#78 &#32 &#79 &#70 &#32 &#84 &#72 &#69 &#32 &#77 &#79 &#79 &#78

004C 0049 0042 0052 0041 0054 0049 004F 004E      004F 0046      0054 0048 0045      004D 004F 004F 004E

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