And, in this case, it was a massive undertaking to explore a planet, and to come to understand a planetary system that, for all of human history, had been unreachable, and now humans had actually touched it.
这样，探索一颗行星是一个极大的任务 并且，实现探索了一个人类历史上不曾踏足的 行星系统 是多么一个壮举