Let's take a closer look at the Chinese title of the film “流浪地球”. The character “球” means sphere or ball. Please use dictionary to find out , the “球” in which word below means the same as it in the word “地球”?

让我们认真地看一下电影的名字《流浪地球》。“球”的意思是“球体”或者“球”。请利用词典，想一下下面哪个词中“球”的意思和“地球”中“球”的意思一样。