Or you may admire the beautiful rings of saturn to see how icy rocks form the ring system ; or venture to jupiter s satellite io to experience a hell of continual volcanic eruptions ; or land on the methane ocean of saturn s satellite titan to feel the environment where life first formed on earth 又可以在星空中细赏土星美丽的光环，了解大大小小的冰块，如何组成一圈圈的光环又或者踏上不断有火山爆发的木卫一艾奥，感受一下四周满布硫磺火山灰的炼狱并且降落土卫六泰坦的甲烷海洋，亲身经历有如地球天地初开时候的环境。
