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人类下一个目标就是载人登上火星。载人火星航行则是人类历史上破天荒的第一次,还需要解决因长期星际飞行产生的若干难题,比如,载人飞船要飞往火星,首先必须摆脱地球引力的束缚。飞船飞往火星走什么样的航线和航行时间的长短取决于它相对于太阳的速度。速度越大,飞往火星的航程越短,航行时间也越短。双切轨道要求的初始速度最小(11.6千米/秒),是最省能量的航线,但是它的航程长,航行时间也长。沿双切轨道飞抵火星需要259天。
The next human goal is to manned Mount Mars. Manned Mars Voyage is the first mankind history, but also need to solve some of the problems caused by long-term interstellar flights, such as manned spacecraft to fly to Mars, we must first get rid of the constraints of the gravitational pull of the Earth. The spacecraft to fly to Mars and what the length of the route depends on the speed of its relative to the sun. The greater the speed, the shorter the voyage to Mars, sailing time is shorter. The minimum initial speed (11.6 km / s) required for the double-cut orbit is the most energy-efficient route, but its long voyage and long sailing time. It takes 259 days to fly to Mars along a double-cut orbit.