StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Heidelberg
4.4
out of 10
Low confidence
Models disagree on tonight — actual conditions may be cloudier.
Peak 2h
6.500:00–02:00
Prime 21–01
4.721:00–01:00
Best this week
9.0Sun, Jun 7
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 23:08–06:16
Sky now
Clear · 0%
Measured at EDFM · 14km away · 19min ago
Sun ↓ 21:22·Dark from 22:22·89% clouds
🔭
Moon visible today
18:56 – 21:22 · 98% lit · great for telescope viewing
Next great night
Friday — 7.3
🌙 Good night ahead
Sky quality tonight
Best: 00:00–02:00This 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.