StarsOutAlert me on good nights
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
Leiden
1.9
out of 10
Peak 2h
5.002:00–04:00
Prime 21–01
1.621:00–01:00
Best this week
8.6Sun, Jun 7
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 22:50–05:22
📍 S · 9°
Sky now
Clear · 0%
Measured at EHRD · 23km away · 29min ago
Sun ↓ 21:52·Dark from 22:52·100% clouds
🔭
Moon visible today
18:56 – 21:52 · 98% lit · great for telescope viewing
Next great night
Friday — 7.7
✨ Great night tonight
Sky quality tonight
Best: 02:00–04:00This week’s nights
Europe/AmsterdamHow 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.