StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Cologne
4.1
out of 10
Peak 2h
7.001:00–03:00
Prime 21–01
3.821:00–01:00
Best this week
9.1Sat, Sep 5
Moon
Waning Gibbous
91% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:39–09:20
📍 W · 7°
Full moon: Sep 26
Sun ↓ 20:22·Dark from 21:22·78% clouds
🔭
Moon visible today
06:44 – 08:35 · 91% lit · great for telescope viewing
Next great night
Thursday — 7.4
🌙 Good night ahead
Sky quality tonight
Best: 01:00–03:00This 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.