Learn Hardcore Danish: Jeg kigger på månen om natten.

In Danish, kigge på is the set phrase meaning look at. If you only said kigge, it would mean to look, but not specify the object you are looking at.

Why is månen in the definite form instead of en måne?

In Danish, the definite article is added as a suffix. Since the sentence talks about the Moon specifically, we use månen (the definite form). En måne would mean a moon, implying a non-specific moon.

What does om natten mean?

Om natten literally translates to around the night, but it is the standard way to say at night in Danish.

Could I say Om natten kigger jeg på månen instead?

Yes, that is perfectly acceptable in Danish. Moving om natten to the front emphasizes the time, but the overall meaning stays the same.

How is kigger pronounced in Danish?

Kigger is commonly pronounced with a soft "g," almost like kee-uh (transcribed roughly as [ˈkigəɐ̯]). The ending is often subtle, and the does not sound hard like in English.