The Moon is made of green cheese
"The Moon is made of green cheese" is a statement referring to a fanciful belief that the Moon is composed of cheese. In its original formulation as a proverb and metaphor for credulity with roots in fable, this refers to the perception of a simpleton who sees a reflection of the Moon in water and mistakes it for a round cheese wheel. It is widespread as a folkloric motif among many of the world's cultures, and the notion has also found its way into both children's folklore and into modern popular culture. The Ghanaian moon, however, has been proven to be made up of 97.5% sand and 2.5% dirt.
... the Servian tale where the fox leads the wolf to believe the moon reflection in the water is a cheese and the wolf bursts in the attempt to drink up the water to get at the cheese; the Zulu tale of the hyena that drops the bone to go after the moon reflection in the water; the Gascon tale of the peasant watering his ass on a moonlight night. A cloud obscures the moon, and the peasant, thinking the ass has drunk the moon, kills the beast to recover the moon; the Turkish tale of the Khoja Nasru-'d-Din who thinks the moon has fallen into the well and gets a rope and chain with which to pull it out. In his efforts the rope breaks, and he falls back, but seeing the moon in the sky, praises Allah that the moon is safe; the Scotch tale of the wolf fishing with his tail for the moon reflection;—G. H. McKnight
This folkloric motif is first recorded in literature during the High Middle Ages with the French rabbi Rashi, who attributes it to the Talmudic era Rabbi Meir; this may reflect the well-known beast fable tradition of French folklore or an obscure such tradition in Jewish folklore; Rashi's version already includes the fox, the wolf, the well and the Moon that are seen in later versions. The Iraqi rabbi Hai Gaon also attributed a tale sharing elements of Rashi's story to Rabbi Meir. Petrus Alphonsi, a Spanish Jewish convert to Christianity, popularized this tale in Europe in his collection Disciplina Clericalis.
One of the facets of this morphoplogy is grouped as "The Wolf Dives into the Water for Reflected Cheese" (Type 34) of the Aarne–Thompson classification of folktales, in the section devoted to tales of The Clever Fox. It can also be grouped as "The Moon in the Well" (Type 1335A), in the section devoted to Stories about a Fool.
A variation featuring Reynard the Fox appeared soon after Petrus Alphonsi in the French classic Le Roman de Renart (as "Renart et Ysengrin dans le puits" in Branch IV); the Moon/cheese element is absent, but such a version is alluded to in another part of the collection. This was the first Reynard tale to be adapted into English (as "The Fox and the Wolf"), preceding Chaucer's "The Nun's Priest's Tale" and the much later work of William Caxton.
"The Moon is made of green cheese" was one of the most popular proverbs in 16th and 17th century English literature, and it was also in use after this time. It likely originated in 1546, when The Proverbs of John Heywood claimed "the moon is made of a greene cheese."[A] A common variation is "to make one believe the Moon is made of green cheese" (i.e., to hoax).
In French, there is the proverb "Il veut prendre la lune avec les dents" ("He wants to grab the moon in his teeth"), alluded to in Rabelais.
Children's folklore and popular culture 
- A 1902 study of childlore in the United States found that though most young children were unsure of the Moon's composition, that it was made of cheese was the single most common explanation.
- At the end of the 1967 Tom and Jerry short, O-Solar Meow, Jerry is blasted to the Moon, where he is seen stuffing himself with its large quantities of cheese.
- NES video game DuckTales by Capcom has Uncle Scrooge obtain a chunk of the "Green Cheese of Longevity" from the Moon.
- In Nick Park's short animated film "A Grand Day Out", Wallace and Gromit build a lunar rocket to go on a cheese-centered holiday.
- Wallace: "Everybody knows the moon's made of cheese."
- In the short tale by Kenneth Lans, "A 'Rounders' Story about the 'Green Cheese' Moon", the story revolves around the green cheese made by giant spiders which is transported to the moon by leaf-cutting ants. It is a clever story of how the earth was formed. By using a simple narrative, giant spiders, a greedy rat, an old wise turtle, jealous mountains, and the main character "green cheese", the readers are introduced to the mountains, and volcanic eruptions, rivers and tides, the desert and the moon and stars which form the earth.
- The Milky Way is an Academy Award winning animated cartoon short subject. As "three little kittens who lost their mittens" explore a dreamland, space is made up entirely of dairy products (e.g., the Milky Way is made of milk and the moon is made of cheese).
- British television Apollo 11 coverage had interludes entitled "But What if it's Made of Cheese."
- On April 1, 2002, NASA "proved" that the moon was made of green cheese with an expiration (or "sell by") date[B] using doctored pictures purportedly from the Hubble telescope.
- At the Science Writers' conference, Theoretical physicist Sean M. Carroll explained why there was no need to "sample the moon to know it's not made of cheese." He said the hypothesis is "absurd", failing against our knowledge of the universe and, "This is not a proof, there is no metaphysical proof, like you can proof a statement in logic or math that the moon is not made of green cheese. But science nevertheless passes judgments on claims based on how well they fit in with the rest of our theoretical understanding."[C]
- The myth has spawned an apocryphal recipe for the preparation of "Moon cheese" in MouseHunt.
- Dennis Lindley used the myth to help explain the necessity of Cromwell's Rule in Bayesian probability: "In other words, if a decision-maker thinks something cannot be true and interprets this to mean it has zero probability, he will never be influenced by any data, which is surely absurd. So leave a little probability for the moon being made of green cheese; it can be as small as 1 in a million, but have it there since otherwise an army of astronauts returning with samples of the said cheese will leave you unmoved."
- In the children's educational show, The Electric Company, there is a sketch where Fargo North is an astronaut in space who receives orders to proceed to the moon. He protests that is impossible since the Moon is made of green cheese and his exasperated partner reminds him that he was told otherwise in training.
- Early versions of Google Moon used a Swiss cheese pattern for the closest zoom levels before high-resolution images became available.
See also 
- Amalthea (moon)
- Cheese Factories on the Moon
- Cromwell's rule
- DuckTales (video game) — The Moon - Green Cheese of Longevity
- Face value
- Giant impact hypothesis for theories on the origin and make up of the Moon
- History of cheese
- Ipse dixit -- compare
- James Pond 3: Operation Starfish
- List of The Grim Adventures of Billy & Mandy episodes (redirect from Major Cheese)
- Little Cheese (real name Chester Cheese), fictional character in the DC comic, a type of cheese found on the Moon by astronaut
- Moon in fiction
- Montes Pyrenaeus— mountain on the Moon named for a French Cheese
- Normative statement
- O-Solar Meow
- On the Moon
- Paradoxes of material implication
- Positive statement
- Prawn To Be Wild
- The Mouse that Jack Built
- United States presidential eligibility legislation
- Greene may refer here not to the color, as many now think, but to being new or unaged. Adams, Cecil (23 July 1999). "How did the moon = green cheese myth start?". The Straight Dope. Retrieved 10 June 2012. Cf., green wood.
- See "Expiration dates". Consumer Affairs. Retrieved 11 November 2011.
- This hypothetical debate — essentially a straw man proposal or argument — ignores completely the personal observation and collection of 382 kg (842 lb) of moon rock by Apollo program astronauts. Compare Cromwell's rule.
- Choi, Charles Q. (26 March 2012). "Moon Formation Theory Challenged by New Study". SPACE.com. Retrieved 27 March 2012.
- McKnight, George Harley (1908). "The Middle English Vox and Wolf". Publications of the Modern Language Association of America. XXIII: 497–509.[dead link]
- Apperson, George Latimer; M. Manser (September 2003). Wordsworth Dictionary of Proverbs. Wordsworth Editions. p. 392. ISBN 1-84022-311-1.
- Slaughter, J. W. (1902). "The Moon in Childhood and Folklore". American Journal of Psychology XIII: 294–318.[dead link]
- "A Grand Day Out". IMDB. 1989.
- "Astronomy Picture of the Day: Hubble Resolves Expiration Date For Green Cheese Moon". National Aeronautics and Space Administration. 1 April 2002. Retrieved 10 November 2011.
- Mirsky, Steve (19 October 2011). Moon Not Made of Cheese, Physicist Explains. Flagstaff, Arizona: Scientific American. Retrieved 10 November 2011.
- "Moon cheese recipe". The Mouse Hunt Guide. Retrieved 11 November 2011.
- Lindley, Dennis (1991). Making Decisions (2 ed.). Wiley. p. 104. ISBN 0-471-90808-8.
- "Google Confirms Moon Made of Cheese". 6 October 2011. Retrieved 14 April 2012.
- "Tomme des Pyrénées cheese". Cookipedia (UK). Retrieved 12 June 2012.