Daily stargazing alerts
Know when
the stars come out.
Each morning we check tonight’s sky. If it’s 8 or higher, we email you. Otherwise we stay quiet.
Detecting your location…
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Calculating…
How the score works
60% weight
Cloud cover
Layer-weighted across the best 2-hour window of the night. Low clouds block everything, thin high cirrus still lets bright stars through.
40% weight
Moon darkness
A new moon boosts the score. A full moon near midnight washes out all but the brightest stars. We ease the penalty after midnight when the moon is setting.