翻译一个科技文章的句子

题目

翻译一个科技文章的句子
Though a giant carbon planet would be predominantly gas, a rocky, carbon-based body the size of Neptune — about 17 Earth masses — would probably have landscapes of diamond and graphite, says Kuchner.

答案

Kuchner说,虽然巨大的碳行星的组成物质大部分是气体,但是一个由岩石组成的个头相当于海王星--是地球体积的17倍大--的碳行星,将极有可能拥有钻石和石墨内核.