Venus (Latin: [ˈwɛnʊs]) is a Roman goddess principally associated with love, beauty, sex, fertility, prosperity and military victory. She played a key role in many Roman religious festivals. From the third century BC, the increasing Hellenization of Roman upper classes identified her as the equivalent of the Greek goddess Aphrodite which in turn is the copy and the equivalent of the Phoenician goddess Astarte. Roman mythology made her the divine mother of Aeneas, the Trojan ancestor of Rome's founder, Romulus.
Venus has been described as perhaps "the most original creation of the Roman pantheon", and "an ill-defined and assimilative" native goddess, combined "with a strange and exotic Aphrodite". Venus embodies sex, beauty, enticement, seduction and persuasive female charm among the community of immortal gods; in Latin orthography, her name is indistinguishable from the Latin noun venus ("sexual love" and "sexual desire"), from which it derives.
Her cults may represent the religiously legitimate charm and seduction of the divine by mortals, in contrast to the formal, contractual relations between most members of Rome's official pantheon and the state, and the unofficial, illicit manipulation of divine forces through magic. The ambivalence of her function is suggested in the etymological relationship of the root *venes- with Latin venenum (poison, venom), in the sense of "a charm, magic philtre".
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus is an inferior planet from Earth, it never appears to venture far from the Sun: its elongation reaches a maximum of 47.8°. Venus reaches its maximum brightness shortly before sunrise or shortly after sunset, for which reason it has been known as the Morning Star or Evening Star.
Venus is classified as a terrestrial planet and it is sometimes called Earth's "sister planet" owing to their similar size, gravity, and bulk composition. Venus is covered with an opaque layer of highly reflective clouds of sulfuric acid, preventing its surface from being seen from space in visible light. Venus has the most dense atmosphere of all the terrestrial planets in the Solar System, consisting of mostly carbon dioxide. The atmospheric pressure at the planet's surface is 92 times that of the Earth. Venus has no carbon cycle to lock carbon back into rocks and surface features, nor does it seem to have any organic life to absorb it in biomass. Venus is believed to have previously possessed oceans, but these evaporated as the temperature rose owing to the runaway greenhouse effect. The water has most probably photodissociated, and, because of the lack of a planetary magnetic field, the free hydrogen has been swept into interplanetary space by the solar wind. Venus's surface is a dry desertscape with many slab-like rocks, periodically refreshed by volcanism.
The term "mythology" can refer either to the study of myths (e.g., comparative mythology), or to a body or collection of myths (a mythos, e.g., Inca mythology). In folkloristics, a myth is a sacred narrative usually explaining how the world or humankind came to be in its present form, although, in a very broad sense, the word can refer to any traditional story. Myths typically involve supernatural characters and are endorsed by rulers or priests. They may arise as overelaborated accounts of historical events, as allegory for or personification of natural phenomena, or as an explanation of ritual. They are transmitted to convey religious or idealized experience, to establish behavioral models, and to teach.
Early rival classifications of Greek mythos by Euhemerus, Plato's Phaedrus, and Sallustius were developed by the neoplatonists and revived by Renaissance mythographers as in the Theologia mythologica (1532). Nineteenth-century comparative mythology reinterpreted myth as evolution toward science (E. B. Tylor), "disease of language" (Max Müller), or misinterpretation of magical ritual (James Frazer). Later interpretations rejected opposition between myth and science, such as Jungian archetypes, Joseph Campbell's "metaphor of spiritual potentiality", or Lévi-Strauss's fixed mental architecture. Tension between Campbell's comparative search for monomyth or Ur-myth and anthropological mythologists' skepticism of universal origin has marked the 20th century. Further, modern mythopoeia such as fantasy novels, manga, and urban legend, with many competing artificial mythoi acknowledged as fiction, supports the idea of myth as ongoing social practice.