File:Traité de mécanique céleste (1798) (14597824739).jpg

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Identifier: gri_33125010894901 (find matches)
Title: Traité de mécanique céleste
Year: 1798 (1790s)
Authors: Laplace, Pierre Simon, marquis de, 1749-1827 Crapelet, Charles, 1762-1809 Duprat, J. B. M Courcier, Louis, 1755?-1811
Subjects: Celestial mechanics Tides Capillarity
Publisher: A Paris : De L'Imprimerie de Crapelet : Chez J.B.M. Duprat ...
Contributing Library: Getty Research Institute
Digitizing Sponsor: Getty Research Institute

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oules ajoute , et que lon suppose tf.(r>co,°*) dt on aura N: Enfin , si lon multiplie la première des équations (i) , par — r. sin. 6. cos. v ; la seconde, par — r. sin. 8. sin. v ; quon les ajoute à la troisième, multipliée par cos. 9 , et que lon fasse ddô dv* . . . srdrdS P = r%.-, r-^.-i— .sin. 8.cos. 9 + —-; i dt dt* dt* * on aura Les valeurs de r, v et 9, renferment six arbitraires introduites parles intégrations. Considérons trois quelconques de ces arbitraires que nous désignerons par a, b, c; léquation M=(^-^-J don-nera les trois suivantes : /ddQ\ /dr\ /ddQ\ /dv\ fddQ\ ( db\__(dM\;\drV \d^)+\drdv) \d^)+\d7ds) \ dli)^\da~)/ddQ\ /dr\ /ddQ\ /dv\ /ddQ\ (M\__/dM\ \^J\dl>) + \d7dï>) \dl>)+\d7dl) \ db)~~\dT)* /ddQ\ /dr\ /ddQ\ /dv\ SddCA fdê\_/ dM\ \^)\Tc)+(didv) \Tc)+\dTs)\Tc)^\dT)i On tirera de ces équations, la valeur de (^J~fj > e^ si lon fait \db J \dc / \dc J \db J_(dv\ /dù\ /diA /dû\n-\ïc)\da)~\Ta)\Tc)S /dv\ /dù\ /dv\\d^)\db)~\Tb)\da)i
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PREMIÈRE PARTIE, LIVRE II. 149 /dM\ kt fdM\ . , afl (dM\ 0==m.^cos.^.(;— J + ^cos.Ô.(^-)+/>.r .cos. fl.^J + m • 00k« 9. jjjg) + cos. 9. (^) cos. 9. (£) + f. ( 2 r .M. cos.a 9 — P. sin. 9. cos. 9). Dans la théorie de la lune, on néglige les perturbations que sonaction produit dans le mouvement relatif du soleil autour de laterre , ce qui revient à regarder sa masse comme infiniment petite.Alors les variables x,y, z, relatives au soleil, sont indépendantesde x,y, z , et léquation (G) a lieu dans cette théorie ; il faut doncque les valeurs trouvées pour r, v et 9 ,y satisfassent, ce qui donneun moyen de vérifier ces valeurs. Si les inégalités observéesdans le mouvement de la lune, sont le résultat de lattraction mu-tuelle de ces trois corps , le soleil, la terre et la lune, il faut que lesvaleurs de r, v & 9 , tirées des observations , satisfassent à léqua-tion (G), ce qui donne un moyen de vérifier la théorie de lapesanteur universelle ; car les longitu

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https://www.flickr.com/photos/internetarchivebookimages/14597824739/

Author

Laplace, Pierre Simon, marquis de, 1749-1827; Crapelet, Charles, 1762-1809; Duprat, J. B. M;

Courcier, Louis, 1755?-1811
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30 July 2014



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