Question

（Judging） from his appearance,he comes from the north.

Answer 1

第一句：judging from 表示：根据…判断,由…推测,是固定结构,不能用judged from,比如：

Judging from his look,he's a very serious person.

从他的外表来看,他是一个严肃的人.

第二句：seen 与后面的主语the earth存在着逻辑上的被动关系.

句意：从太空上看,地球是一个蓝色的星球.