When the ancient tomb of the Marquis of Zeng was unearthed at Mawangdui (Hunan Province) in the 1970s, archeologists discovered drawings of 29 types of comets. The tails were depicted in many forms: double, hooked, perfectly straight, etc.
長沙馬王堆出土的西漢二十九幅「彗星圖」上，幾十種彗星，有的拖著辮子般的尾巴，有的尾巴彎轉如眉，有的又端正筆直。