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September 2025

Rennes, France48.1173, -1.6778
lightpollutionmap.info
Light Pollution:
Bortle 6SQM 19.2
1→ 2
5
Moderate, end of night
2→ 3
4
Moderate, end of night
3→ 4
4
Difficult
4→ 5
3
Difficult
5→ 6
2
Difficult
6→ 7
1
Difficult
7→ 8
0
Difficult
8→ 9
0
Difficult
9→ 10
1
Difficult
10→ 11
1
Difficult
11→ 12
2
Difficult
12→ 13
3
Difficult
13→ 14
3
Difficult
14→ 15
4
Moderate, begin of night
15→ 16
5
Moderate, begin of night
16→ 17
6
Moderate, begin of night
17→ 18
7
Moderate, begin of night
18→ 19
7
Moderate, begin of night
19→ 20
8
Excellent
20→ 21
9
Excellent
21→ 22
10
Excellent
22→ 23
10
Excellent
23→ 24
9
Excellent
24→ 25
9
Excellent
25→ 26
8
Excellent
26→ 27
8
Moderate, end of night
27→ 28
7
Moderate, end of night
28→ 29
7
Moderate, end of night
29→ 30
6
Moderate, end of night
30→ 1
5
Moderate, end of night