Meteoric Astronomy Electronic Resource a Treatise On Shooting Stars Fire Ball
Meteoric Astronomy Electronic Resource a Treatise On Shooting Stars Fire Ball
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In our eReader you can find the full English version of the book. Read Meteoric Astronomy Electronic Resource a Treatise On Shooting Stars Fire Ball Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Meteoric Astronomy Electronic Resource a Treatise On Shooting Stars Fire Ball
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To quickly assess the difficulty of the text, read a short excerpt:
I 7 ....... ' i 14 ....... A 21 ..... . . *V 28 ....... , | F 35 ....... ' Tf^ 70 .......
etc. Etc.
From this table it will be seen that at the height of 35 miles the air is one thousand times rarer than at the surface of the earth; and that, supposing the same rate of decrease to continue, at the height of 140 miles the rarity would be one trillion times greater. The atmosphere, however, is not unlimited. When it becomes so rare that the force of repulsion between its particles is counterbalan...ced by the earth's attrac- tion, no further expansion is possible. To determine the altitude of its superior surface is a problem at once difficult and interesting. Not many years since about 45 or 50 miles were generally regarded as a probable limit. Considerable light, however, has been thrown upon the question by recent observa- tions in meteoric astronomy. Several hundred det- onating meteors have been observed, and their average height at the instant of their first appear- ance has been found to exceed 90 miles.
What to read after Meteoric Astronomy Electronic Resource a Treatise On Shooting Stars Fire Ball?
You can find similar books in the "Read Also" column, or choose other free books by Daniel Kirkwood to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
I 7 ....... ' i 14 ....... A 21 ..... . . *V 28 ....... , | F 35 ....... ' Tf^ 70 .......
etc. Etc.
From this table it will be seen that at the height of 35 miles the air is one thousand times rarer than at the surface of the earth; and that, supposing the same rate of decrease to continue, at the height of 140 miles the rarity would be one trillion times greater. The atmosphere, however, is not unlimited. When it becomes so rare that the force of repulsion between its particles is counterbalan...ced by the earth's attrac- tion, no further expansion is possible. To determine the altitude of its superior surface is a problem at once difficult and interesting. Not many years since about 45 or 50 miles were generally regarded as a probable limit. Considerable light, however, has been thrown upon the question by recent observa- tions in meteoric astronomy. Several hundred det- onating meteors have been observed, and their average height at the instant of their first appear- ance has been found to exceed 90 miles.
What to read after Meteoric Astronomy Electronic Resource a Treatise On Shooting Stars Fire Ball?
You can find similar books in the "Read Also" column, or choose other free books by Daniel Kirkwood to read onlineMoreLess
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