Meaning Of The Word Astronomical twilight

Real Dictionary

What's the definition of Astronomical twilight? Find Astronomical twilight meanings, definitions and more at the Real Dictionary online.

Astronomical twilight Meaning

Astronomical twilight Definition
Astronomical twilight Definition

What's The Definition Of Astronomical twilight?

astronomical twilight in American English
noun: either of two periods of partial darkness, after sunset or before sunrise, when the center of the sun is more than 6° but less than 18° below the horizon

astronomical twilight in British English
noun: the period of time during which the sun is 18° below the horizon

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