Ever since man perceived that the solar system is a cohort of planets revolving around a central sun, at different distances but in the same direction and in almost the same plane, he has wondered how ...

THE object of the present treatise is to establish in a modified form the nebular theory of Laplace, by the introduction of some original views which have long occupied the attention of the author.

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THE nebular hypothesis of the origin of the planetary system, presented by Laplace “avec la défiance que doit inspirer tout ce qui n'est point un résultat de I'observation ou du calcul,” is now just ...