libration of the moon — the combination of four libration effects that causes parts of the side of the moon turned to the earth to be alternately visible and invisible so that as much as 59 percent of the moon s entire surface can be observed from the earth * * *… … Useful english dictionary
parallactic libration of the moon — diurnal libration of the moon caused by the observer s view over the upper limb of the moon when it is rising and setting … Useful english dictionary
Orbit of the Moon — Not to be confused with Lunar orbit in the sense of a selenocentric orbit, that is, an orbit around the Moon The Moon completes its orbit around the Earth in approximately 27.3 days (a sidereal month). The Earth and Moon orbit about their… … Wikipedia
Far side of the Moon — The far side of the Moon is the lunar hemisphere that is permanently turned away from the Earth. The far hemisphere was first photographed by the Soviet Luna 3 probe in 1959, and was first directly observed by human eyes when the Apollo 8 mission … Wikipedia
Observing the Moon — The waxing gibbous Moon as observed from Earth The Moon is Earth s largest natural satellite and the nearest major celestial object. Observing the Moon can be accomplished by using a variety of instruments ranging from the naked eye to large… … Wikipedia
Near side of the Moon — The names of the major seas and some craters on the near side of the Moon The near side of the Moon is the lunar hemisphere that is permanently turned towards the Earth, whereas the opposite side is the far side of the Moon. Only one side of the… … Wikipedia
Libration — Li*bra tion (l[ i]*br[=a] sh[u^]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]… … The Collaborative International Dictionary of English
libration — [ librasjɔ̃ ] n. f. • 1547; lat. libratio ♦ Astron. Balancement apparent (d un astre, et spécialement de la Lune). « un capteur optique de la position angulaire du Soleil pour étudier la libration de Phobos » (Sciences et Avenir, 1988). ●… … Encyclopédie Universelle
Libration — This article is about astronomical observations. For molecular motion, see Libration (molecule). Not to be confused with Liberation, Libation, or Vibration. Simulated views of the Moon over one month, demo … Wikipedia
Moon — This article is about Earth s Moon. For moons in general, see Natural satellite. For other uses, see Moon (disambiguation) … Wikipedia
