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- Classical_planet abstract "In antiquity the classical planets were the seven non-fixed objects visible in the sky. The classical planets were, therefore, the Sun and Moon and the five planets Mercury, Venus, Mars, Jupiter, and Saturn. The name planet comes from the Greek term πλανήτης, planētēs, meaning "wanderer", as ancient astronomers noted how certain lights moved across the sky with the other stars. They called these objects asteres planetai, or wandering stars. Together they form the seven classical planets or 7 planets of the ancients, as well as the names of the seven days of the week - Sun-day, Moon-day, Saturn-day, and in Latin, 'Martis' (Mars, Tuesday), 'Mercurii' (Wednesday), 'Iovis' (Jupiter, Thursday) and 'Veneris' (Venus, Friday).Mercury and Venus are only visible in twilight hours as their orbits are interior to the Earth's orbit. The third brightest object in the sky, Venus is the most prominent planet. Mercury is more difficult to see due to its proximity to the Sun. Lengthy twilight and an extremely low angle at maximum elongations make optical filters necessary to see Mercury from extreme polar locations. Mars is at its brightest when it is in opposition, which occurs approximately every twenty-five Earth-months. Jupiter and Saturn are the largest of the five planets, but are farther from the sun, and therefore receive less sunlight. Nonetheless, Jupiter is often the next brightest object in the sky after Venus. Saturn's luminosity is often enhanced by its rings, which reflect light back toward the Earth to varying degrees depending on their inclination to the ecliptic; however, the rings themselves are not visible to the naked eye from the Earth. Uranus and sometimes the asteroid Vesta are visible to the naked eye in principle on very clear nights, but unlike the true naked-eye planets they are always less luminous than several thousands of stars, and as such, do not stand out enough for their existences to be noticed without the aid of a telescope.".
- Classical_planet wikiPageExternalLink www.nakedeyeplanets.com.
- Classical_planet wikiPageExternalLink movements.htm.
- Classical_planet wikiPageExternalLink history.html.
- Classical_planet wikiPageID "587247".
- Classical_planet wikiPageRevisionID "599022533".
- Classical_planet hasPhotoCollection Classical_planet.
- Classical_planet subject Category:Ancient_astronomy.
- Classical_planet subject Category:Chinese_astronomy.
- Classical_planet subject Category:Early_scientific_cosmologies.
- Classical_planet subject Category:History_of_astrology.
- Classical_planet subject Category:History_of_astronomy.
- Classical_planet subject Category:Mythological_cosmologies.
- Classical_planet subject Category:Planets_of_the_Solar_System.
- Classical_planet type Abstraction100002137.
- Classical_planet type Cognition100023271.
- Classical_planet type Content105809192.
- Classical_planet type Cosmology106163223.
- Classical_planet type Discipline105996646.
- Classical_planet type EarlyScientificCosmologies.
- Classical_planet type HumanisticDiscipline106153846.
- Classical_planet type KnowledgeDomain105999266.
- Classical_planet type Metaphysics106162653.
- Classical_planet type MythologicalCosmologies.
- Classical_planet type Philosophy106158346.
- Classical_planet type PsychologicalFeature100023100.
- Classical_planet comment "In antiquity the classical planets were the seven non-fixed objects visible in the sky. The classical planets were, therefore, the Sun and Moon and the five planets Mercury, Venus, Mars, Jupiter, and Saturn. The name planet comes from the Greek term πλανήτης, planētēs, meaning "wanderer", as ancient astronomers noted how certain lights moved across the sky with the other stars. They called these objects asteres planetai, or wandering stars.".
- Classical_planet label "Classical planet".
- Classical_planet label "Planeta a simple vista".
- Classical_planet label "كوكب سيار".
- Classical_planet label "五星".
- Classical_planet label "古典行星".
- Classical_planet sameAs Planeta_a_simple_vista.
- Classical_planet sameAs 五星.
- Classical_planet sameAs 고대_행성.
- Classical_planet sameAs m.02sstn.
- Classical_planet sameAs Q1135397.
- Classical_planet sameAs Q1135397.
- Classical_planet sameAs Classical_planet.
- Classical_planet wasDerivedFrom Classical_planet?oldid=599022533.
- Classical_planet isPrimaryTopicOf Classical_planet.