Edible astronomy

I realize I am again dating myself, but back in the day I used to read a number of usenet groups; alt.folklore.urban was a particular favourite, and I still retain some quirks of textual style I picked up there. One newsgroup I always kept an eye on was alt.humor.best-of-usenet. I didn't, by design, have any original content; instead any particularly amusing post from any other newsgroup could be forwarded there. They weren't always funny, but some postings were downright hilarious. Recently I came across somebody's archive of their favourite postings, a number of which I remember. One I didn't see at the time I find hilarious: What if the moon were made of green cheese?

The science seems about right.