Hypnos comes from the name of his Latin counterpart, Somnus. (in- "not" + somnus "sleep"), as well as a few less-common words such as "somnolent", meaning sleepy or tending to cause sleep and hypersomnia meaning excessive sleep, which can be caused by many conditions (known as secondary hypersomnia) or a rare sleep disorder causing excessive sleep with unknown cause, called Idiopathic Hypersomnia. 3D model of "Bronze head of Hypnos" via laser scan of a cast of British Museum's bronze. Hypnos In Greek mythology, Hypnos (; , "sleep") is the personification of sleep; the Roman equivalent is known as Somnus. In the
Greek mythology in popular culture bodies have been named after elements of Greek mythology. The constellation of Scorpius represents the scorpion that attacked Hercules and the scorpions that frighted the horses when Phaëton was driving the sun-chariot; while Capricorn may represent Pan in a myth that tells of his escape from Typhon by jumping into the water while turning into an animal - the half in the water turned into a fish and the other half turned into a goat. 1108 Demeter, a main-belt asteroid discovered by Karl Reinmuth on May 31, 1929, is named after the Greek goddess of fruitful soil and agriculture. The