Editing Chinese calendar (section)

===Planets===
The movements of the Sun, Moon, [[Mercury (planet)|Mercury]], [[Venus]], [[Mars]], [[Jupiter]] and [[Saturn]] (sometimes known as the [[Classical planet|seven luminaries]]) are the references for calendar calculations. 
* The distance between Mercury and the sun is less than 30° (the sun's height at ''chénshí'':{{linktext|辰時|lang=zh}}, 8:00 to 10:00&nbsp;am), so Mercury was sometimes called the "chen star" ({{linktext|辰|星|lang=zh}}); it is more commonly known as the "water star" ({{linktext|水星|lang=zh}}).
* Venus appears at dawn and dusk and is known as the "bright star" ({{zh|labels=no|s={{linktext|启明|星}}|t={{linktext|啟明|星}}}}) or "long star" ({{zh|labels=no|c=|s={{linktext|长庚|星}}|t={{linktext|長庚|星}}}}).
* Mars looks like fire and occurs irregularly, and is known as the "fire star" ({{zh|labels=no|c=|s={{linktext|荧惑|星}}|t={{linktext|熒惑|星}}}} or {{linktext|火星|lang=zh}}). Mars is the punisher in Chinese mythology. When Mars is near [[Antares]] ({{linktext|心宿二|lang=zh}}), it is a bad omen and can forecast an emperor's death or a chancellor's removal ({{linktext|荧惑|守|心|lang=zh}}).
* Jupiter's revolution period is 11.86 years, so Jupiter is called the "age star" ({{zh|labels=no|c=|s={{linktext|岁星}}|t={{linktext|歲星}}}}); 30° of Jupiter's revolution is about a year on earth.
* Saturn's revolution period is about 28 years. Known as the "guard star" ({{linktext|鎮星|lang=zh}}), Saturn guards one of the [[Twenty-Eight Mansions|28 Mansions]] every year.