StarsOut
Should you go outside tonight?
Drop everything — go outside
Near-perfect conditions. Nights like this are rare.
Cologne
9.6
out of 10
Peak 2h
10.022:00–00:00
Prime 21–01
9.921:00–01:00
Best this week
9.2Mon, Jul 20
Moon
Waxing Crescent
5% lit
Moon doesn’t interfere — perfect darkness
🔭 Moon up: 08:02–22:56
Full moon: Jul 29
Sky now
Clear · 0%
Measured at EDDK · 16km away · 20min ago
Sun ↓ 21:39·Dark from 22:39·46% clouds
Alert me on good nightsSky quality tonight
Best: 22:00–00:00This week’s nights
Europe/BerlinHow 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.