到目前为止,在人类通向太空的征途中,共研制出了三种载人航天器:载人飞船、航天飞机和空间站。在这三种载人航天器中,飞船的规模最小,相对于其他两种载人航天器而言,技术难度低,费用也较少,是被最先使用的一种载人航天器。虽然飞船相对来讲复杂程度低一些,但它还是远比卫星等无人航天器要复杂得多。飞船,分载人飞船、货运飞船和载人货运混合飞船。按照飞行任务的不同,载人飞船又可分为绕地球运行的卫星式载人飞船、把航天员送入月球的登月式载人飞船和进行 To date, three types of manned spacecraft have been developed during mankind’s journey to space: manned spacecraft, space shuttle and space station. Among the three types of manned spacecraft, the spacecraft is the smallest manned spacecraft, which is the first manned spacecraft to be used compared to the other two types of manned spacecraft with less technical difficulty and less expense. Although the spacecraft is relatively less complex, it is far more complex than unmanned spacecraft such as satellites. Spacecraft, manned spacecraft, cargo spacecraft and manned mixed cargo spacecraft. In accordance with the different mission, the manned spacecraft can be divided into satellite-based manned spacecraft orbiting the Earth, astronauts into the moon lunar manned spacecraft and carried out