Question 54: Is the moon located between the heavens or under the lowest heaven? If it is between the heavens, how can humans travel to the surface of the moon?
Answer: It is probable that the moon is between the heavens, or beneath the lowest heaven. There is no evidence that confirms either one of these two probabilities. Moreover, Allaah’s Statement (the meanings of which are translated as): And has made the moon a light therein does not include evidence that determines whether its place is in between them. The propositional phrase “Feehin” (therein) may refer to the word “Nooraa” (light). Therefore, the meaning would be that Allaah has made the moon a light in the heavens, so its light is there the same as it is in the earth. It does not necessarily mean that the moon exists between the heavens. Consequently, if it is not between the heavens, it will be easy to reach it by modern inventions… read more here.