Abstract

Photometric measurements indicate that the presence of a long shaft causes no real change in the contrast of a star against the daytime sky. Moreover, physiological data suggest that contrary to popular opinion such a shaft may actually have an adverse effect on the daylight visibility of stars.

© 1955 Optical Society of America

Visibility of Stars at High Altitude in Daylight

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J. Opt. Soc. Am. 49(6) 626-629 (1959)

The Visibility of Stars in the Daylight Sky

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J. Opt. Soc. Am. 38(10) 886-896 (1948)

The Visibility of Stars and Planets During Twilight

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Naked eye visibility of Sirius in broad daylight

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Luminance of the Sun

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