- published: 06 Jul 2016
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Jupiter, also Jove (Latin: Iuppiter [ˈjʊppɪtɛr], gen. Iovis [ˈjɔwɪs]), is the god of sky and thunder and king of the gods in Ancient Roman religion and mythology. Jupiter was the chief deity of Roman state religion throughout the Republican and Imperial eras, until Christianity became the dominant religion of the Empire. In Roman mythology, he negotiates with Numa Pompilius, the second king of Rome, to establish principles of Roman religion such as sacrifice.
Jupiter is usually thought to have originated as a sky god. His identifying implement is the thunderbolt and his primary sacred animal is the eagle, which held precedence over other birds in the taking of auspices and became one of the most common symbols of the Roman army (see Aquila). The two emblems were often combined to represent the god in the form of an eagle holding in its claws a thunderbolt, frequently seen on Greek and Roman coins. As the sky-god, he was a divine witness to oaths, the sacred trust on which justice and good government depend. Many of his functions were focused on the Capitoline Hill, where the citadel was located. He was the chief deity of the early Capitoline Triad with Mars and Quirinus. In the later Capitoline Triad, he was the central guardian of the state with Juno and Minerva. His sacred tree was the oak.
Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two and a half times that of all the other planets in the Solar System combined. Jupiter is a gas giant, along with Saturn. (Uranus and Neptune are ice giants.) Jupiter was known to astronomers of ancient times. The Romans named it after their god Jupiter. When viewed from Earth, Jupiter can reach an apparent magnitude of −2.94, bright enough for its reflected light to cast shadows, and making it on average the third-brightest object in the night sky after the Moon and Venus.
Jupiter is primarily composed of hydrogen with a quarter of its mass being helium, though helium comprises only about a tenth of the number of molecules. It may also have a rocky core of heavier elements, but like the other giant planets, Jupiter lacks a well-defined solid surface. Because of its rapid rotation, the planet's shape is that of an oblate spheroid (it has a slight but noticeable bulge around the equator). The outer atmosphere is visibly segregated into several bands at different latitudes, resulting in turbulence and storms along their interacting boundaries. A prominent result is the Great Red Spot, a giant storm that is known to have existed since at least the 17th century when it was first seen by telescope. Surrounding Jupiter is a faint planetary ring system and a powerful magnetosphere. Jupiter has at least 67 moons, including the four large Galilean moons discovered by Galileo Galilei in 1610. Ganymede, the largest of these, has a diameter greater than that of the planet Mercury.
Mythology is a collection of myths, especially one belonging to a particular sacred, religious or cultural tradition of a group of people. Myths are a collection of stories told to explain nature, history, and customs–or the study of such myths.
As a collection of such stories, mythology is a vital feature of every culture. Various origins for myths have been proposed, ranging from personification of nature, personification of natural phenomena to truthful or hyperbolic accounts of historical events, to explanations of existing ritual. Although the term is complicated by its implicit condescension, mythologizing is not just an ancient or primitive practice, as shown by contemporary mythopoeia such as urban legends and the expansive fictional mythoi created by fantasy novels and comics. A culture's collective mythology helps convey belonging, shared and religious experience, behavioural models, and moral and practical lessons.
The study of myth dates back to antiquity. Rival classifications of the Greek myths by Euhemerus, Plato's Phaedrus, and Sallustius were developed by the Neoplatonists and revived by Renaissance mythographers. Nineteenth-century comparative mythology reinterpreted myth as a primitive and failed counterpart of science (E. B. Tylor), a "disease of language" (Max Müller), or a misinterpretation of magical ritual (James Frazer).