What is the suns movement in these verses?

in Quran 21:33 and Quran 36:40 the verses mention the day and the night and the sun and the moon in an orbit swimming. What is meant by the sun not being able to overtake the moon? Does that mean the sun cant rise at night, or does it mean the sun cant collide with the moon? And I already know the sun has its own orbit, but in these verses the way the day and night and sun and moons orbits are mentioned seems relative to each other and it wouldnt make sense that the suns orbit around the galaxy affects the day and night Could the orbitting of the sun and moon mean from our perspectives? Like how we see the sun rise and set and the same with the moon? Or would this interpretation not work with the word "falak". Also what is meant by the orbitting of the day and night? It seems to mean from our perspective so would the same apply for the sun and moon? I'm really struggling to understand this and would really appreciate an explanation because this causes me a lot of doubts