The Quran directs people to observe what is in the heavens and the earth.
قُلِ ٱنظُرُواْ مَاذَا فِي ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِۚ وَمَا تُغۡنِي ٱلۡأٓيَٰتُ وَٱلنُّذُرُ عَن قَوۡمࣲ لَّا يُؤۡمِنُونَ ١٠١
Say, "Observe what is in the heavens and earth." But of no avail will be signs or warners to a people who do not believe