Editing Classical planet (section)

{{Short description|Planets visible to the naked eye}}
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{{Redirect|Wandering stars|other uses|Wandering star (disambiguation){{!}}Wandering star}}
{{For|the failed IAU planet category of Classical Planets|IAU definition of planet}}
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{{astrology}}
A '''classical planet''' is an [[astronomical object]] that is visible to the [[naked eye]] and moves across the sky and its [[celestial dome|backdrop]] of [[fixed star]]s (the common stars which seem still in contrast to the planets), appearing as '''wandering stars'''. Visible to humans on Earth there are '''seven classical planets''' (the '''seven luminaries'''). They are from [[apparent magnitude|brightest to dimmest]]: the [[Sun]], the [[Moon]], [[Venus]], [[Jupiter]], [[Mercury (planet)|Mercury]], [[Mars]] and [[Saturn]].

Greek astronomers such as [[Geminus]]<ref>{{Citation | last = Goldstein | first = Bernard R. | author-link = Bernard R. Goldstein | date = 2007 | title = What's New in Ptolemy's ''Almagest'' | journal = Nuncius | volume = 22 | issue = 2 | page = 271 | doi = 10.1163/221058707X00549 | doi-access = free }}</ref> and [[Ptolemy]]<ref>{{Citation | last = Pedersen | first = Olaf | author-link = Olaf Pedersen | date = 2011 | title = A Survey of the Almagest | series = Sources and Studies in the History of Mathematics and Physical Sciences | publisher = Springer Science + Business Media | place = New York / Dordrecht / Heidelberg / London | isbn = 978-0-387-84825-9 }}</ref> recorded these classical planets during [[classical antiquity]], introducing the term ''[[planet]]'', which means 'wanderer' in [[Greek language|Greek]] ({{lang|grc|πλάνης}} {{Transliteration|grc|planēs}} and {{lang|grc|πλανήτης}} {{Transliteration|grc|planētēs}}), expressing the fact that these objects move across the [[celestial sphere]] relative to the fixed stars.<ref>[http://csep10.phys.utk.edu/astr161/lect/classification/classification.html Classification of the Planets]</ref><ref>{{LSJ|pla/nhs|πλάνης}}, {{LSJ|planh/ths|πλανήτης|ref}}.</ref> Therefore, the Greeks were the first to document the astrological connections to the planets' visual detail.<ref>{{Citation |last=Campion |first=Nicholas |title=The Planets in Alchemy and Astrology (Medieval and Renaissance) |date=2022-03-23 |encyclopedia=Oxford Research Encyclopedia of Planetary Science |url=https://oxfordre.com/planetaryscience/display/10.1093/acrefore/9780190647926.001.0001/acrefore-9780190647926-e-178 |access-date=2024-02-11 |language=en |doi=10.1093/acrefore/9780190647926.013.178 |isbn=978-0-19-064792-6|url-access=subscription }}</ref>

Through the use of [[telescope]]s other celestial objects like the classical planets were found, starting with the [[Galilean moons]] in 1610. Today the term ''planet'' is used considerably differently, with a planet [[definition of planet|being defined]] as a [[natural satellite]] directly orbiting the Sun (or [[Exoplanet|other stars]]) and having cleared its own orbit. Therefore, only five of the seven classical planets remain recognized as planets, alongside [[Earth]], [[Uranus]], and [[Neptune]].