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English[en]
Regarding the fixed stars, the Sun appears from Earth to revolve once a year along the ecliptic through the zodiac, and so Greek astronomers categorized it as one of the seven planets (Greek planetes, "wanderer"); the naming of the days of the weeks after the seven planets dates to the Roman era.
Chinese[zh]
作為一顆恆星,從地球上看到太陽每年沿著黃道帶上的黃道繞行一圈,所以希臘天文學家認為它也是七顆行星之一;在一些語言中還用來命名一周七天中的一天。

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