StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Leuven
4.4
out of 10
Peak 2h
6.400:00–02:00
Prime 21–01
4.921:00–01:00
Best this week
8.4Fri, Jun 5
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 22:40–05:31
📍 S · 10°
Sky now
Clear · 0%
Measured at EBBR · 12km away · 25min ago
Sun ↓ 21:45·Dark from 22:45·100% clouds
🔭
Moon visible today
18:56 – 21:45 · 98% lit · great for telescope viewing
Next great night
Friday — 8.4
✨ Great night tonight
Sky quality tonight
Best: 00:00–02:00This week’s nights
Europe/BrusselsHow 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.