Definitions for libration
laɪˈbreɪ ʃənli·bra·tion

Princeton's WordNetRate this definition:0.0 / 0 votes

1. librationnoun

   (astronomy) a real or apparent slow oscillation of a moon or satellite

   "the libration of the moon"

WiktionaryRate this definition:0.0 / 0 votes

1. librationnoun

   The act of librating.

2. librationnoun

   The apparent wobble or variation in the visible side of the Moon that permanently faces the Earth, allowing observers on Earth to see, over a period of time, slightly more than half of the lunar surface.

3. librationnoun

   A similar rotational or orbital characteristic of some other celestial body.

4. Etymology: From libratio, from libro.

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. Librationnoun

   Etymology: libratio, Latin; libration, French.

   1. The state of being balanced.

   This is what may be said of the balance, and the libration, of the body. John Dryden, Dufresnoy.

   Their pinions still
   In loose librations stretch’d, to trust the void
   Trembling refuse. James Thomson, Spring.

   2. [In astronomy.]Libration is the balancing motion or trepidation in the firmament, whereby the declination of the sun, and the latitude of the stars, change from time to time. Astronomers likewise ascribe to the moon a libratory motion, or motion of trepidation, which they pretend is from east to west, and from north to south, because that, at full moon, they sometimes discover parts of her disk which are not discovered at other times. These kinds are called, the one a libration in longitude, and the other a libration in latitude. Besides this, there is a third kind, which they call an apparent libration, and which consists in this, that when the moon is at her greatest elongation from the south, her axis being then almost perpendicular to the plane of the ecliptick, the sun must enlighten towards the north pole of the moon some parts which he did not before, and that, on the contrary, some parts of those which he enlightened towards the opposite pole are obscured; and this produces the same effect which the libration in latitude does. Dict. Trev.

   Those planets which move upon their axis, do not all make intire revolutions; for the moon maketh only a kind of libration, or a reciprocated motion on her own axis. Nehemiah Grew.

WikipediaRate this definition:0.0 / 0 votes

1. Libration

   In lunar astronomy, libration is the wagging or wavering of the Moon perceived by Earth-bound observers and caused by changes in their perspective. It permits an observer to see slightly different hemispheres of the surface at different times. It is similar in both cause and effect to the changes in the Moon's apparent size due to changes in distance. It is caused by three mechanisms detailed below, two of which cause a relatively tiny physical libration via tidal forces exerted by the Earth. Such true librations are known as well for other moons with locked rotation. The quite different phenomenon of a trojan asteroid's movement has been called Trojan libration; and Trojan libration point means Lagrangian point.

ChatGPTRate this definition:0.0 / 0 votes

1. libration

   Libration is a term in astronomy and physics that refers to the oscillating motion of a celestial body, such as a moon or planet, from the perspective of an observer on a different celestial body. This motion can make it possible to see different portions of the celestial body's surface at different times. Libration can occur as a result of different factors including orbital eccentricity and differences in orbital speed.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Librationnoun

   the act or state of librating

2. Librationnoun

   a real or apparent libratory motion, like that of a balance before coming to rest

3. Etymology: [L. libratio: cf. F. libration.]

WikidataRate this definition:0.0 / 0 votes

1. Libration

   In astronomy, libration is an oscillating motion of orbiting bodies relative to each other, notably including the motion of the Moon relative to Earth, or of Trojan asteroids relative to planets.

The Nuttall EncyclopediaRate this definition:0.0 / 0 votes

1. Libration

   the name given to certain apparent movements in the moon as if it swayed like a balance both in latitude and longitude in its revolution round the earth.

Matched Categories

1. • Oscillation
   • Variation

How to pronounce libration?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say libration in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of libration in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of libration in Pythagorean Numerology is: 1

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=libration
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Libration
3. ^ Samuel Johnson's Dictionary
   https://johnsonsdictionaryonline.com/views/search.php?term=libration
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Libration
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/libration
7. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=libration
8. ^ The Nuttall Encyclopedia
   https://www.gutenberg.org/cache/epub/12342/pg12342-images.html#Libration