StarsOut
Should you go outside tonight?
Good night ahead
Mostly clear. Worth setting up.
Vienna
7.5
out of 10
Peak 2h
10.002:00–04:00
Prime 21–01
6.021:00–01:00
Moon
Waxing Crescent
23% lit
Moon below horizon — perfect darkness
Sun ↓ 19:53·Dark from 20:53·42% clouds
Alert me on good nightsSky quality tonight
Best: 02:00–04:00This week’s nights
Europe/ViennaHow 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.