Tonight: The waning gibbous Moon rises in the east near the end of astronomical twilight. The end of astronomical twilight is defined as the time when the Sun is 18° below the horizon. After the end of astronomical twilight, the sky is as dark as it”s going to get. Not counting light pollution from cities, towns and the Moon. Civil and nautical twilights end when the Sun is 6° and 12° below the horizon. During nautical twilight the sky is dark enough to see most of the brighter stars and planets but not the dimmest stars visible in the night time sky.

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