一直以来,寻找地外生命广受世人关注。迄今为止,天文学家们已经确定,太阳系中除地球以外的8颗大行星上都不可能有生命存在。但是,这8颗大行星周围都有各自的卫星绕其运转,这些卫星上会不会有生命存在呢?最近,伽利略木星探测器把我们的目光聚焦在木卫二这颗冰冻的星球上。 木卫二是木星的4颗大卫星中最明亮的一颗,它的半径约1570千米,轨道长半径为670000千米。根据早期旅行者2号获得的照片得知, All along, looking for extraterrestrial life by the world’s attention. So far, astronomers have determined that life can not exist on all of the eight large planets in the solar system except Earth. However, these eight planets around their own satellite orbit around their own, these satellites will not have life? Recently, Galileo Jupiter detector our eyes focused on Europa this frozen planet. Europa is the brightest of the four large stars of Jupiter, with a radius of about 1,570 kilometers and a long radius of 670,000 kilometers. According to photos taken by early travelers on the 2nd,