供职于德国哥根廷马克思普朗克协会进行太阳系研究的霍尔格思科表示，这颗彗星的内部密度仅为水的一半。
The comet's interior, meanwhile, says Holger Sierks of the Max Planck Institute for Solar System Research, in Göttingen, Germany, has only half the density of water.
艾娃·佳斯里尼恩是研究婚姻和同居问题的专家，她帮助研究者为德国罗斯托克市的马克斯·普朗克协会做了这份报告。
Aiva Jasilioniene, an academic specialising in marriage and cohabitation studies, helped produce the report for the Max Planck Institute in Rostock, Germany.
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