本世纪末,天上将出现多个人造月亮,它们能把阳光反射到地球上的任何城镇乡村、湖泊海洋。地球上将产生真正的不夜城、不夜海。三四十年后,从地球到金星往返一次将只需14天……这一切,都要归功于航天史上的又一创举——太阳帆。早在20年代,前苏联科学家弗里德里希·灿德尔就提出了利用太阳帆进行星际航行的设想。 At the end of this century, there will be many artificial moons in the sky. They can reflect sunlight to any town, village or lake on the earth. There will be a real night city and a sea of ​​night. After thirty or forty years, it will take only 14 days to return to Earth from Venus.... All of this is due to another pioneering move in the history of space—the solar sail. As early as the 1920s, the former Soviet Union scientist Friedrich Zandre proposed the use of solar sails for the idea of ​​interplanetary navigation.