The Stellar Heavens: An Introduction to the Study of the Stars and Nebulę (Classic Reprint) - Rilegato

Gore, J. Ellard

Rilegato

ISBN 10: 0365181358 ISBN 13: 9780365181354

Casa editrice: Forgotten Books, 2019

Riassunto

Excerpt from The Stellar Heavens: An Introduction to the Study of the Stars and Nebulę

The constellations-number of Stars - Star Magni tudes - Colours of Stars Spectra - Parallax and Distance - Absolute Size - Proper Motions - The Sun's Motion in Space.

The Constellations, - The stars Visible to the naked eye have been divided into groups, called constellations. These are now chiefly used for the purpose of reference, but in ancient times they were associated with the figures of men and animals, etc. The origin of these constella tion figures is somewhat doubtful, but they are certainly of great antiquity. Ptolemy's constellations were 48 in number, but different writers, from the first century b.c., give various numbers, ranging from 43 to 62. Bayer's Atlas, published in 1603, contains 60, 12 new constella tions in the Southern Hemisphere having been added by Theodorus to Ptolemy's original 48. The present number is 84. Bayer's Atlas was the first to show the Southern sky, and the first to designate the brighter stars by the letters of the Greek alphabet, a (alpha.

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Dettagli dell'edizione

• Editore: Forgotten Books
• Data di pubblicazione: 2019
• Lingua: Inglese
• ISBN 10: 0365181358
• ISBN 13: 9780365181354
• Rilegatura: Copertina rigida
• Numero di pagine: 144
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