Moon phase tonight
Friday, May 21, 2027
Moon phase on May 21
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Full Moon
100% illuminated · 15.4 days into the lunar cycle
Illumination
100%
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Next Full Moon
May 210d away
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Next New Moon
Jun 414d away
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Sky-watching conditions
With 100% of the moon lit, expect significant moonlight — only a bright, active aurora is likely to stand out against the sky glow. Check the aurora forecast for tonight's Kp index and visibility odds.