A Primer of Evolution
by Edward Clodd (9781459059511)

A Primer of Evolution
 
Edward Clodd
Release Date: 10 December 0140
Format: Paperback
Pages: 50
Category: Evolution
Publisher: General Books
ISBN: 9781459059511
ISBN-10: 1459059514



Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER II. THE DISTRIBUTION OF MATTER. We have learned that Matter is invisible as well as visible; and ponderable or weighable, as well as imponderable. In its imponderable or ethereal form, it fills the intervals between the atoms which compose all bodies, and the enormous intervals between the bodies themselves. In its ponderable form it is distributed through space in bodies of varying densities. Dealing with the greater masses, we have?as the sand by the sea-shore innumerable?the ' fixed ' stars, so called because, owing to their vast distances from us, they have no apparent motion of their own, although travelling at enormous speed. Each of these, unless it be an extinct, burnt-out body, shines by its own light as our sun does, and, like him, is probably the centre of a system of planets with their satellites or moons, and other bodies. Speaking broadly, the stars do not differ from one another in the stuff of which they are made, for the light thrown by the spectroscope on the chemistry of the heavenly bodies has revealed their general identity of structure. It matters not how distant is the star, so long as the light which it radiates is strong enough; broken on the prism of thespectroscope, it tells what elements are present in the glowing vapour, and even the direction in which the star is moving. Stars differ very much in their sizes and brilliancy or ' magnitude, ' while their various colours probably give a clue to their stage of development. White stars, many of which are closely connected with nebulous matter, are probably in the earlier stages of formation into solar systems; those whose spectra correspond to the solar spectrum will have reached the sunlike state; while the red stars would be approaching the decrepit stage which precedes the blotting-out...

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