The astronomical zodiac actually contains 13 constellations –the 12 that we’re familiar with plus another one, called Ophiuchus.

　　天文星座实际上有13个星座——12个我们很熟悉的星座加上另外一个蛇夫座。

　　Ophiuchus was deliberately lt out of the original zodiac, over 2000 years ago, even though the Sun clearly passes in front of it after passing in front of Scorpius (commonly known as Scorpio) and bore reaching Sagittarius. The reason for this is not known, but it may be because ancient astrologers wanted to divide the 360 degree path of the Sun in a mathematically pleasing way –12 equal parts, each one of 30 degrees.

　　2000年前，尽管太阳在经过天蝎座(英文Scorpius通常写作Scorpio)后光明正大地在蛇夫座面前经过，并朝着射手座方向前进，蛇夫座还是被人故意从原有的星座中剔除。其原因不得而知，但可能是因为古占星家想用比较方便的算术法来划分太阳的360度运动路径——分成12等份，每部分30度。

　　However the true boundaries that divide the constellations, as described by the International Astronomical Union, are far from equal. For example Ophiuchus is behind the Sun for a full 19 days of the year. That’s 12 days more than its neighbour, Scorpius.

　　不过，据国际天文联合会称，真正划分星座的分界线很难均等化。举个例子，蛇夫座在位于距太阳后面整整19天路程的位置，比附近星座天蝎座多出12天路程的距离。

　　So if you were born between 30 November and 18 December, why not claim yourself a totally new star sign?

　　所以如果你是在11月30日到12月18日中间出生的，为什么不把自己归入到一个新的星座中去呢?

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