: : 突然发现这件事说^^ : 既然你这麽诚恳的请教我 : 我就大发慈悲地告诉你 : 玛圣兰是金星上面最大的一块大陆 : (就像地球的欧亚非大陆一样) : 所以就用之来命名 : 水星应该也是这样 : 不然就是最大的坑洞 水星的情形跟金星似乎不一样 曼宁拉（マリナ？）（Mariner 10，水手10号）是造访水星的第一艘太空船。 下面有一篇文章可以参考（那艘太空船也逛了金星） Mariner 10 used Venus as a gravity assist to Mercury in 1974. The probe did return the first close-up images of the Venusian atmosphere in ultraviolet, revealing previously unseen details in the cloud cover, plus the fact that the entire cloud system circles the planet in four Earth days. Mariner 10 eventually made three flybys of Mercury from 1974 to 1975 before running out of attitude control gas. The probe revealed Mercury as a heavily cratered world with a mass much greater than thought. This would seem to indicate that Mercury has an iron core which makes up 75 percent of the entire planet. (more from JPL and JPL)