Glossary term: 泰坦
Description: 土卫六（泰坦）是土星最大的卫星。它比月球和水星都大，是太阳系中第二大的卫星。除地球外，土卫六是唯一已知表面有液态大洋、海和河流的天体。不过，这些都是由被称为碳氢化合物的化学物质构成的。土卫六被认为有一个岩石核心和一个由水构成的冰壳。人们认为冰壳下的液态水可能孕育着生命。土卫六的大气层很厚，主要由氮气构成，这使得它在照片上看起来非常光滑。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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Related Media
土卫六自然色彩图像
Credit: 美国宇航局/喷气推进实验室/空间科学研究所 credit link
License: PD Public Domain icons
具有表面特征的土卫六
Credit: 美国宇航局 / 喷气推进实验室 / 亚利桑那大学 / 爱达荷大学 credit link
License: PD Public Domain icons
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