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Some observations recently made by Prof. W. H. Pickering in Jamaica, make the value of sunlight 540,000 times that of moonlight. This makes the sun’s “stellar magnitude” minus 26·83, and that of moonlight minus 12·5. Prof. Pickering finds that the light of the full moon is equal to 100,000 stars of zero magnitude. He finds that the moon’s “albedo” is about 0·0909; or in other words, the moon reflects about one-tenth of the light which falls on it from the sun. He also finds that the light of the full moon is about twelve times the light of the half moon: a curious and rather unexpected result.
- АвторДжон Еллард Гор
- ВидавництвоProject Gutenberg
- Рік видання2012 р.
- Оригінальна назваAstronomical Curiosities: Facts and Fallacies
- Тип книгиЕлектронна книга