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茫茫宇宙,浩瀚星空,大自然中有太多的奥秘牵动着人们的好奇心,催促着人们不停地探索追寻。但是,时至今日,探测器只不过刚飞抵太阳系边缘,载人飞船也仅仅到过月球而已。难道说现有的技术水平还无法实现人类太空寻梦的理想?1903年,俄国物理学家康斯坦丁·齐奥尔科夫斯基发现了星际旅行中的巨大障碍,即火箭的最大速度不可能超过火箭推进器喷口喷出物质速度的两倍。今天的航天飞机在飞行过程中,燃料燃烧后从喷口喷出的速度低于3英里/秒(1英里≈1.6千
The vast universe, the vast sky, there are too many mysteries in nature affect people’s curiosity, urging people to constantly explore the pursuit. However, up till now, the probe has only just arrived at the edge of the solar system and the manned spacecraft has just reached the moon. Could it not be said that the current state of the art can not achieve the ideal of human space dreaming? In 1903, the Russian physicist Konstantin Kiolkovsky discovered a huge obstacle in the interstellar travel, that is, the rocket’s maximum speed is impossible More than twice the velocity of the propellant jets. Today’s space shuttle flies at a rate of less than 3 mph (1 mile ≈ 1.6 kph)