The Moon: considered as a planet, a world, and a satellite.

CHAPTER I.

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ON THE COSMICAL ORIGIN OF THE PLANETS OF THE SOLAR SYSTEM. 1 Origination of Material Things—Celestial Vapours—Nebulæ—Their vast Numbers—Sir W. Herschel’s Observations and Classification—Buffon’s Cosmogony—Laplace’s Nebular Hypothesis—Doubts upon its Validity—Support from Spectrum Analysis