How do you know that Møn is a Dark Sky place?
The entire Dark Sky Park part of Møn and Nyord has a fantastic night sky.
This is because Møn is an island in Denmark with no light pollution.
The unit called 'MPSAS" (mag/arcsec2) is used to indicate how dark the sky is. The higher the number, the darker the sky. When the unit increases by 1, it means that the amount of light pollution is doubled. And every time the amount of light pollution is doubled, the number of visible stars is halved.
In clear weather without moonlight, the sky above Møn has a value of around 21.8.
On the Bortle scale, it corresponds to between 1 and 2, i.e. the best class available.
It must be seen in relation to e.g. Copenhagen, where MPSAS is around 18. This is 8 times more light pollution than Møn. In Køge the number is 20, i.e. 4 times as much light as on Møn.
We constantly measure how dark it is on Møn. The results can be seen here.
The measurements show that Møn is extremely dark at night. We are doing our best to preserve the darkness, by trying to convince people to use less outdoor lighting, and limit light pollution from businesses.
There is an association called Dark Sky Denmark, working to prevent the increasing light pollution, by teachinng children and others about light pollution and its bad effects on people and wildlife.