Apollo 10 was the fourth manned mission in the American Apollo space program. It was an F type mission—its purpose was to be a "dry run" for the Apollo 11 mission, testing all of the procedures and components of a Moon landing without actually landing on the Moon itself. The mission included the second crew to orbit the Moon and an all-up test of the lunar module (LM) in lunar orbit. The LM came to within 8.4 mi (13.5 km) of the lunar surface during practice maneuvers.

According to the 2002 Guinness World Records, Apollo 10 set the record for the highest speed attained by a manned vehicle at 39,897 km/h (11.08 km/s or 24,791 mph) during the return from the Moon on May 26, 1969.

Due to the use of their names as call signs, the Peanuts characters Charlie Brown and Snoopy became semi-official mascots for the mission.Peanuts creator Charles Schulz also drew some special mission-related artwork for NASA.

Apollo 10 was the first of only two Apollo missions with an entirely flight-experienced crew. Stafford had flown on Gemini 6 and Gemini 9; Young had flown on Gemini 3 and Gemini 10, and Cernan had flown with Stafford on Gemini 9.

Apollo (Attic, Ionic, and Homeric Greek: Ἀπόλλων, Apollōn (gen.: Ἀπόλλωνος); Doric: Ἀπέλλων, Apellōn; Arcadocypriot: Ἀπείλων, Apeilōn; Aeolic: Ἄπλουν, Aploun; Latin: Apollō) is one of the most important and complex of the Olympian deities in ancient Greek and Roman religion, Greco–Roman Neopaganism, and Greek and Roman mythology. The ideal of the kouros (a beardless, athletic youth), Apollo has been variously recognized as a god of light and the sun, truth and prophecy, healing, plague, music, poetry, and more. Apollo is the son of Zeus and Leto, and has a twin sister, the chaste huntress Artemis. Apollo is known in Greek-influenced Etruscan mythology as Apulu.

As the patron of Delphi (Pythian Apollo), Apollo was an oracular god—the prophetic deity of the Delphic Oracle. Medicine and healing are associated with Apollo, whether through the god himself or mediated through his son Asclepius, yet Apollo was also seen as a god who could bring ill-health and deadly plague. Amongst the god's custodial charges, Apollo became associated with dominion over colonists, and as the patron defender of herds and flocks. As the leader of the Muses (Apollon Musegetes) and director of their choir, Apollo functioned as the patron god of music and poetry. Hermes created the lyre for him, and the instrument became a common attribute of Apollo. Hymns sung to Apollo were called paeans.

Richard "Rich" Hall (born 10 June 1954) is an American comedian, writer and musician.

Hall was born in Alexandria, Virginia and grew up in Mecklenburg County, North Carolina. He is part Cherokee Indian and his mother's Christian name is Doris. Early in his career, he performed as a street comedian with a suitcase and stand, traveling the college circuit, and performing impromptu skits for gathering crowds.

Hall's first professional work was as a writer and performer on the American sketch comedy TV series Fridays from 1980 until 1982. After the end of Fridays, Hall co-wrote and starred in the satirical comedy series Not Necessarily the News from 1983 until 1990 where he coined the term "sniglet" and collected and published several volumes of books of them. Matt Groening has described him as the inspiration for Moe Szyslak from The Simpsons. He was also a regular on Saturday Night Live. In 1986, he had his own Showtime channel special, Vanishing America, which was turned into a book with the same title. He hosted a talk show during The Comedy Channel's 1990-91 season, titled Rich Hall's Onion World.