Publisher's Synopsis
Excerpt from Catalogue des �toiles Doubles Et Multiples en Mouvement Relatif Certain: Comprenant Toutes les Observations Faites sur Chaque Couple Depuis Sa D�couverte, Et les R�sultats Conclus de l'�tude des Mouvements
Il y a 558 syst�mes orbitaux certains ou probables, 317 groupes de perspective, 17 syst�mes physiques dont les composantes se d�placent en ligne droite, 23 sys temes ternaires, 32 triples non ternaires form�es d'un syst�me binaire et d'un com pagnou optique, etc., etc.
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