Astronomy for Everybody a Popular Exposition of the Wonders of the Heavens
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In our eReader you can find the full English version of the book. Read Astronomy for Everybody a Popular Exposition of the Wonders of the Heavens 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 Astronomy for Everybody a Popular Exposition of the Wonders of the Heavens
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To quickly assess the difficulty of the text, read a short excerpt:
But the parallax of a planet is so small that it can be determined only with the most refined instruments.
The ends of the base line used in the determination may be any two points on the earth's surface say the observatories of Greenwich and the Cape of Good Hope. In the case of the transits of Venus, which we have al- ready described, there were a number of different sta- tions at various points on the earth's surface, from which the direction of Venus at the beginning and end of its transit ...could be inferred. This method of determining distances is called triangulation.
The idea of a triangulation, as thus set forth, gives an understanding only of the general principle involved in the problem. One can readily see that it would be out of the question for two observers in distant parts of the earth to get the exact direction of a planet at the same THE MOTION OF LIGHT 239 moment of time. The actual determination of the paral- lax requires a combination of observations too complex to be set forth in the present book, but the fundamental principle is that just explained.
What to read after Astronomy for Everybody a Popular Exposition of the Wonders of the Heavens?
You can find similar books in the "Read Also" column, or choose other free books by Newcomb Simon to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
But the parallax of a planet is so small that it can be determined only with the most refined instruments.
The ends of the base line used in the determination may be any two points on the earth's surface say the observatories of Greenwich and the Cape of Good Hope. In the case of the transits of Venus, which we have al- ready described, there were a number of different sta- tions at various points on the earth's surface, from which the direction of Venus at the beginning and end of its transit ...could be inferred. This method of determining distances is called triangulation.
The idea of a triangulation, as thus set forth, gives an understanding only of the general principle involved in the problem. One can readily see that it would be out of the question for two observers in distant parts of the earth to get the exact direction of a planet at the same THE MOTION OF LIGHT 239 moment of time. The actual determination of the paral- lax requires a combination of observations too complex to be set forth in the present book, but the fundamental principle is that just explained.
What to read after Astronomy for Everybody a Popular Exposition of the Wonders of the Heavens?
You can find similar books in the "Read Also" column, or choose other free books by Newcomb Simon to read onlineMoreLess
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