A trip into the darkness can have many purposes, and it's of course important to be clear about what you'd like to experience and what you're expecting from the outing.
Weather
If you're mainly interested in stars, planets, galaxies, and other astronomical objects, then weather is the most important factor when choosing a time to head out. You simply can’t see anything in the sky if it’s cloudy.
Here are a couple of links to weather forecasts:
https://clearoutside.com/forecast/54.97/12.41
https://www.dmi.dk/lokation/show/DK/2623659/Borre,_Vordingborg/
The Moon
If you want to see things in the sky that don’t shine brightly, it’s also important to know how much moonlight there will be. A moon calendar shows you when the moon rises and sets. Here’s an example of a calendar showing the moon’s phases and times for the next couple of months:
https://darkskymoen.dk/en/moon
If you're interested in looking at the moon’s dramatic surface and peering into its craters, it's best to do so when it's *not* full moon. The craters are most visible along the line between night and day on the moon, where the sunlight hits at an angle and casts long shadows. That line moves a little each day, so different craters become visible at different times during the moon’s cycle. So if there’s a specific crater you want to see, you’ll need to find out exactly when sunrise or sunset is happening at that spot.
The Season
When we look into the night sky, we’re looking away from the sun — and since we orbit the sun over the course of a year, what we see in the sky changes with the seasons.
This especially affects people who hope to see the Milky Way and end up disappointed when they go out on a winter night. Of course, we can see the Milky Way all year round — all the stars we see belong to it. But in winter, we're looking away from the center of the galaxy, so the big glowing band across the sky just isn’t visible.
Planets
Planets are only visible when they’re on the same side of the sun as we are, and they’re best seen when they’re directly opposite the sun — which also means they’re closest to Earth. If a planet is on the far side of the sun, it’s not visible at night and it’s also much farther away. Since the planets move around the sun at different speeds than Earth, the best time to see each one changes from year to year.
Here’s a bit more information about the planets, and a real-time overview of current positions of celestial objects.
Meteors / Shooting Stars
When it’s dark and clear on Møn, you can see shooting stars every night, all year round.
But there are certain times when you’ll see a lot more than usual. Here's an overview of the major meteor showers you can catch at different times of the year.
Here’s a list of frequently asked questions.
And here are some great tips on how to best experience the night sky.
Enjoy your adventure into the darkness!