The Lunatics of Terra is a collection of science fiction short stories by John Sladek, published in 1984.
[1] Dave Langford reviewed The Lunatics of Terra for White Dwarf #57, and stated that "He's especially good on pseudoscience, getting right inside that viewpoint in the tragicomic 'An Explanation for the Disappearance of the Moon'.
Topnotch stuff.
"[2]