Breakdown of Ich sehe den Sternenhimmel durch das Fenster.
Questions & Answers about Ich sehe den Sternenhimmel durch das Fenster.
Der Sternenhimmel is a masculine noun in the nominative case (subject position).
In the sentence Ich sehe den Sternenhimmel durch das Fenster, Sternenhimmel is not the subject, it is the direct object of the verb sehen (the thing being seen). Direct objects in German normally take the accusative case.
For masculine nouns, the definite article changes like this:
- Nominative: der Sternenhimmel (subject)
- Accusative: den Sternenhimmel (direct object)
So we need den because Sternenhimmel is in the accusative case as the direct object of sehen.