File:The children's book of stars (1908) (14740115576).jpg

Identifier: childrensbookofs00mittuoft (find matches)
Title: The children's book of stars
Year: 1908 (1900s)
Authors: Mitton, G. E. (Geraldine Edith)
Subjects: Astronomy -- Juvenile literature
Publisher: London A. and C. Black
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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at all, for allthe tail-making stuff that was in the head will havebeen used up, and as this is exactly what we do see,the theory is probably true. Where do the comets come from ? That also isa very large question. It used to be supposed theywere merely wanderers in space who happened tohave been attracted by our sun and drawn intohis system, but there are facts which go verystrongly against this, and astronomers now generallybelieve that comets really belong to the solar system,that their proper orbits are ellipses, and that in thecase of those which fly off at such a speed that theycan never return they must at some time have beenpulled out of their original orbit by the influenceof one of the planets. To get a good idea of a really fine comet, until wehave the opportunity of seeing one for ourselves, wecannot do better than look at this picture of acomet photographed in 1901 at the Cape of GoodHope. It is only comparatively recently thatphotography has been applied to comets. When
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vatory. Cape of Gojd Hope A GRKAT COJIKT. SHINING VISITORS 119 Halleys comet appeared last time such a thing wasnot thought of, but when he comes again numbersof cameras, fitted up with all the latest scientificappliances, will be waiting to get good impressionsof him. CHAPTER IX SHOOTING STARS AND FIERY BALLS All the substances which we are accustomed tosee and handle in our daily lives belong to ourworld. There are vegetables which grow in theearth, minerals which are dug out of it, andelementary things, such as air and water, whichhave always made up a part of this planet sinceman knew it. These are obvious, but there areother things not quite so obvious which also helpto form our world. Among these we may class allthe elements known to chemists, many of whichhave difficult names, such as oxygen andhydrogen. These two are the elements whichmake up water, and oxygen is an importantelement in air, which has nitrogen in it too.There are numbers and numbers of other elementsperfectly f

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