Questions & Answers about Słońce jest już nisko, więc idę do domu.
Słońce is the dictionary form of the noun słońce (sun), and here it is the subject of the sentence, so it stays in the nominative case.
A few useful things to notice:
- słońce is a neuter noun
- many neuter Polish nouns end in -e or -o
- because it is singular and nominative, the form is simply słońce
So in Słońce jest już nisko, słońce is just the sun as the subject.
Here jest means is.
So:
- Słońce jest już nisko = The sun is already low
In standard Polish, jest is normal and expected here. Polish sometimes drops to be in more informal, poetic, or headline-like language, for example:
- Słońce już nisko
That can sound more compressed or literary, but for a learner, Słońce jest już nisko is the safest and most standard version.