As a result,it appeared to scientists on earth that the star

As a result,it appeared to scientists on earth that the stars had moved.
这个句子成分不太清楚,that从句是修饰说明谁的?appeared to 后面为什么要跟scientists?

这句话的意思是：因此,在地球上的科学家看来,恒星好像是移动了
是It appeared (to sb) that…句型
It＋动词（look,seem ,appear,happen．．．） ＋that从句.
意为“似乎／看起来/碰巧……”.
将先行词IT 放在句首做形式主语,代替that引导的主语从句.
此处on earth不应该做“究竟”,应做“on the earth”解

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