高磊驾驶着超光速宇宙飞船如期回到了地球。他这次从太空遨游归来,心里有一种说不出的遗憾和失落感。两年前,非太阳系G星球上的外星人,在天王星的五个天然卫星上都建立了太空站。高磊受地球航天局委派,多次到外星人的空间站同他们进行科研交流。多次的交往,使他同外星人结下了深厚的友谊。高磊这次返回时,外星人告诉他,这是他们最后一次相聚了,他们在太阳系的使命已经完成,要撤离天王星, Gao Lei drove the supersonic spacecraft back to Earth on schedule. He returned from space travel this time, and he had a feeling of regret and loss that he could not tell. Two years ago, aliens on the non-solar planet G Planet established space stations on Uranus’ five natural satellites. Gao Lei was appointed by the Earth Space Agency and went to the alien space station several times to conduct scientific research exchanges with them. The many contacts made him have forged deep friendship with aliens. When Gao Lei returned this time, the aliens told him that this was their last time together. Their mission in the solar system had been completed and they were about to withdraw from Uranus.