Herkese merhaba,

Which one is more preferable in Turkish?

Yıldızlar genelde sarı
Yıldızlar genelde sardır

Yıldızlar genelde sardırlar

And on a related note, do we ever use dırlar in Turkish and if so, when?

Yıldızlar genelde sarıdırlar - This is OK but

Yıldızlar genelde sarıdır - This one is preferred because it´s one syllable shorter.

The first one can be thought of as

(I think/In my opinion) ...

The second and third one is like

(I inform you that/Be informed that) ...

Thank you very much for the clarification!