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.

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。

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The German Aerospace Center, the Max Planck Institute for Solar System Research, the Italian space Agency and the Italian National Astrophysical Institute are part of the mission's team.

德国航空航天中心、马克斯·普朗克太阳系研究中心、意大利航天局和意大利国家天体物理研究所也是这个计划工作团队的一部分。

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"Vesta is so rich in features that it will keep the science team busy for years, " said mission scientist Holger Sierks at Germany's Max Planck Institute for Solar System Research.

WSJ: Asteroid Vesta Gets a Close Study