StarsOutAlert me on good nights
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
Tromsø
0.2
out of 10
Peak 2h
1.002:00–04:00
Prime 21–01
0.121:00–01:00
Best this week
4.9Fri, Sep 4
Moon
Waning Gibbous
91% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 19:50–08:51
📍 W · 1°
Full moon: Sep 26
Sun ↓ 20:35·Dark from 21:35·100% clouds
🔭
Moon visible today
04:58 – 08:35 · 91% lit · great for telescope viewing
Sky quality tonight
Best: 02:00–04:00This week’s nights
Europe/OsloHow 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.