Found 1 hit - Term: libration of the moon, Database: *, Strategy: prefix
- [1] : The Collaborative International Dictionary of English v.0.48
libration \libra"tion\ l-ibr=a"shu^n, n. l. libratio:
cf. f. libration.
1. the act or state of librating. --jer. taylor.
1913 webster
2. astron. a real or apparent libratory motion, like that
of a balance before coming to rest.
1913 webster
libration of the moon, 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.
1913 webster
see also:
libration of the moon a b c
Results 1 - 5 of 5 found about libration of the moon: Moon
>> M Words
Moon, definition of term: Moon
moon_pag1.html Libration
>> L Words
Libration, definition of term: Libration
libration_pag1.html Harvest Moon
>> H Words
Harvest Moon, definition of term: Harvest Moon
harvest+moon_pag1.html Full Moon
>> F Words
Full Moon, definition of term: Full Moon
full+moon_pag1.html Blue Moon
>> B Words
Blue Moon, definition of term: Blue Moon
blue+moon_pag1.html
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