The Astrophysical Journal, Vol. 51: An International Review of Spectroscopy and Astronomical Physics; January-June, 1920 (Classic Reprint) - Couverture souple

Hale, George E.

Couverture souple

ISBN 10 : 1334598169 ISBN 13 : 9781334598166

Editeur : Forgotten Books, 2018

Synopsis

Excerpt from The Astrophysical Journal, Vol. 51: An International Review of Spectroscopy and Astronomical Physics; January-June, 1920

The briefness of the time available for preliminary tests was unfortunate in one respect. Owing to the very low altitude of the sun (only twenty minutes after sunrise) when the eclipse took place, the refraction of the terrestrial atmosphere was continually changing at the time, so that the apparent motion of the sun in the sky was at a variable rate, not agreeing with that which pre vailed later in the day. A test of the clock was made on the day preceding the eclipse, but owing to cloudiness it was not possible to follow quite up to the time of the eclipse. Such observations as were made on the preceding day, however, indicated that the clockwork moved a little too slowly and so the rate of the clock was increased about 3 per cent with the expectation of more exactly following the sun at the time of the eclipse. Unfortunately this proved to be too much of a correction so that the clock moved a little too fast during the eclipse, and the images of the moon are not as truly round as they should be.

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Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 1334598169
• ISBN 13: 9781334598166
• Reliure: Broché
• Nombre de pages: 380
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