Muslim has to learn Astronomy becau

Muslim has to learn Astronomy because it's important for him to correctly abide by Islamic activities.

Results (Chinese) 1:

穆斯林有学习天文，因为它是重要的是他正确地遵守伊斯兰活动。

Results (Chinese) 2:

穆斯林都必须学习天文学，因为它让他正确的伊斯兰活动遵循的重要。

Results (Chinese) 3:

穆斯林必须学习天文学，因为他正确地遵守伊斯兰活动是很重要的。