different between syzygy vs selenelion

syzygy

English

Etymology

From Late Latin s?zygia (conjunction), from Ancient Greek ??????? (suzugía, yoke; union). This word was recognized as English in 1847 (in its astronomical meaning).

Pronunciation

  • IPA(key): /?s?.z?.d?i/

Noun

syzygy (countable and uncountable, plural syzygies)

  1. (astronomy, astrology) An alignment of three celestial bodies (for example, the Sun, Earth, and Moon) such that one body is directly between the other two, such as occurs at an eclipse.
    Coordinate terms: perigee, perihelion, proxigee
    • 2004, Phyllis M. Lugger, William Liller, Asteroids to Quasars: A Symposium Honoring William Liller, Cambridge University Press (?ISBN), page 67:
      The duration of an eclipse depends on the relative positions of the sun, moon, and earth in their syzygy.
  2. (Jungian psychology) An archetypal pairing of contrasexual opposites, symbolizing the communication of the conscious and unconscious minds.
    • 2006, Renos K. Papadopoulos, The Handbook of Jungian Psychology: Theory, Practice and Applications, Psychology Press (?ISBN), page 117:
      In 1936 Jung defends his concept of animus and anima by reference to the idea of the syzygy, concluding from the evidence in many different mythologies of the divine couple, united by a sacred marriage, that this motif is as universal as the existence of men and women. He postulates that in the syzygy the archetypal union of the parents is expressed, the mother corresponding to the anima.
  3. (mathematics, linear algebra) A relation between generators of a module.
    • 2015, Henri Lombardi, Claude Quitté, Commutative Algebra: Constructive Methods: Finite Projective Modules, Springer (?ISBN), page 173:
      A finitely presented module is an A-module M given by a finite number of generators and relations. Therefore it is a module with a finite generator set having a finitely generated syzygy module.
  4. (medicine) The fusion of some or all of the organs.
  5. (zoology) The association of two protozoa end-to-end or laterally for the purpose of asexual exchange of genetic material.
    • 2018, Richard E. Blackwelder, The Diversity of Animal Reproduction, CRC Press (?ISBN)
      These include syzygy, fusion of larvae or adults of flatworms, fusion of buds of some Tunicata, somatic fertilization (fusion of spermatozoa with somatic cells), composite zygotes of some Cestoda and Insecta, and fusion of cells in various tissues.
  6. (genetics) The pairing of chromosomes in meiosis.

Translations

See also

  • asterism
  • occultation

Further reading

  • syzygy (astronomy) on Wikipedia.Wikipedia
  • syzygy (disambiguation) on Wikipedia.Wikipedia

syzygy From the web:

  • syzygy meaning
  • syzygy what does it mean
  • syzygy what language
  • what is syzygy in astrology
  • what is syzygy in chess
  • what is syzygy probe depth
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selenelion

English

Alternative forms

  • selenehelion

Etymology

French coinage, from the Ancient Greek ?????? (sel?n?, moon) and ????? (h?lios, sun).

Noun

selenelion (plural selenelions)

  1. A lunar eclipse occurring as the moon sets, simultaneously with sunrise.
    • 2001, Paul Davies, Duncan Steel, Eclipse: The Celestial Phenomenon That Changed the Course of History (Joseph Henry Press) p. 57
      This phenomenon is called a "horizontal eclipse" or, from a French term, "selenelion." ... In modern times, the first record seems to date from 1590, when the great astronomer Tycho Brahe saw a selenelion from his observatory ....
    • 2007, William Poole, "Antoine-François Payen, the 1666 Selenelion, and a Rediscovered Letter to Robert Hooke", Notes and Records of the Royal Society of London, Vol. 61, No. 3 (Sep. 22, 2007), pp. 251-263 JSTOR
      This he immediately published, under the title Selenelion ou Apparition Luni-Solaire .... The coinage ‘selenelion’ was his own .... Payen asserted that refraction on its own could not account for a selenelion...
    • 2010, Kelly Beatty, "In Search of Selenelion", Sky & Telescope (June 26, 2010) [1]
      I decided to watch for an uncommon eclipse phenomenon known as selenelion, seeing the Sun near the horizon and the eclipsed Moon near the opposite horizon at the same time.
    • 2014, Joe Rao, "Total Lunar Eclipse On Wednesday Will Be a Rare 'Selenelion'" [2]
      On Oct. 8, Interested skywatchers should attempt to see the total eclipse of the moon and the rising sun simultaneously. The little-used name for this effect is called a "selenelion," a phenomenon that celestial geometry says cannot happen.
    • 2014, Alan MacRobert, "Eclipse of a Large Moon", Sky & Telescope (October 2014) p. 52
      Meteorologist Joe Rao points out that this eclipse presents an unusual chance to try seeing a selenelion: when the Sun and eclipsed Moon are both above the horizon at once.

Synonyms

  • horizontal eclipse

selenelion From the web:

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