The following excerpt is taken from “The Quran and Modern Science” by Maurice Bucaille:
Stars and Planets
The word ‘star’ (najm) in the Quran (86:3) is accompanied by the adjective thaaqib which indicates that it burns and consumes itself as it pierces through the shadows of the night. It was much later discovered that stars are heavenly bodies producing their own light like the sun.
In the Quran, a different word, kawkab, is used to refer to the planets which are celestial bodies that reflect light and do not produce their own light like the sun.
“We have adorned the lowest heaven with ornaments, the planets” Quran 37:6