Who knows

Firstly, when asking this question, one must consider the possibility of rolling cheese balls flooding the Moon's sky, a phenomenon which was proved to not be improbable by Nicolas Cage in 69 AD, therefore its chances of happening are always above the absolute zero and make the balls in question slightly warmer than Warner Bros.

After apparently shifting the question to the balls and, that way, dodging the dangerous realm of the mundane logic, it is safe to assume that "Who Knows Cheese Balls" is actually a song by Lonered Skinhead, from their 31st studio record "Don't make me shoot" released on the Old Year's Eve of 1666; hence it is not posing any further questions about the topic while simultaneously cutting all the strings attached.

Needless to say, the question supposed in the beginning is not evident and does not threaten to instantly consume one's mind with futile mumbo-jumbo, allowing everyone to continue sleeping well if paying taxes.