File:Bulletin des sciences mathématiques (1870) (14767816445).jpg

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Identifier: bulletindesscien02fran (find matches)
Title: Bulletin des sciences mathématiques
Year: 1870 (1870s)
Authors: France. Ministère de l'éducation nationale
Subjects: Mathematics Astronomy
Publisher: Paris Gauthier-Villars
Contributing Library: Mathematical Sciences - University of Toronto
Digitizing Sponsor: University of Ottawa

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ce moyenne de la Lune aunœud ascendant de son orbite, pour demi-amplitudje 4^, 8, et pourpériode 27-, 218. De sorte que, si lon appelle E et (f ces deux ai^guments, et si lon 12 BULLETIN DES SCIENCES représente par OU laxe instantané de rotation, on a angle Z.OU = - (94,i5)cosE - (42,8)cos9. Il résulte de là les conséquences suivantes : Prenons pour centre de la splière céleste le centre de gravité O dela Lune ; soit Z le pôle boréal de lécliptique^ soit A = i2845 lin-clinaison moyenne de léquateur lunaire sur lécliptique-, posons,pour abréger, 2^ = 4^»^) et deZ, comme pôle, décrivons un cercle avec la distance polaire h-\ Le pôle instantané U décrira sur la sphère céleste une suite de cycloïdes ayant pour bases des arcs FG = GH = HK = .,. = ttÇ, que lon peut regarder comme rectilignes-, et, par conséquent, laxeinstantané OU décrira un cône ayant pour directrice cette suite decycloïdes. (Linclinaison moyenne de léquateur apparent nest pas fe,mais h-h^.)
Text Appearing After Image:
ZF: 3c h =i°28/j5 est linclinaison moyenne de léquateur géométrique sur lécliptique; ^-t-Ç = i°28/;5-t-2i,4 est linclinaison moyenne de léquateur apparent ouinstantané; Ç est le diamètre du cercle générateur de lépicycloïdc. MATHÉMATIQUES ET ASTRONOMIQUES. i3 Pour nous rendre compte de la manière dont le mouvement sac-complit, imaginons dabord que, pendant la moitié de la période da27^,218, largument E reste constant : laxe OU décrira, pendant cetemps, dans le plan mobile Zi Yj, un secteur VOW, correspondant àun arc VW = 4C* ^ produira le mouvement qui a lieu pendant cetemps, en faisant rouler, sans glisser, ce secteur plan sur le cône cy-cloïdal y le pôle instantané U sera le point de contact de larc VW etde la base du cône. Mais largument E varie dune manière continue. On aura égard àcette variation en faisant rouler et glisser en même temps le secteurplan VOW sur le cône cycloïdal. La vitesse angulaire du glissementest facile à calculer. M. Simon mo

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https://www.flickr.com/photos/internetarchivebookimages/14767816445/

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Volume
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2
Flickr tags
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  • bookid:bulletindesscien02fran
  • bookyear:1870
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:France__Minist__re_de_l___ducation_nationale
  • booksubject:Mathematics
  • booksubject:Astronomy
  • bookpublisher:Paris_Gauthier_Villars
  • bookcontributor:Mathematical_Sciences___University_of_Toronto
  • booksponsor:University_of_Ottawa
  • bookleafnumber:17
  • bookcollection:universityofottawa
  • bookcollection:mathematicalsciences
  • bookcollection:toronto
Flickr posted date
InfoField
28 July 2014


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