我国已成功发射了4艘神舟宇宙飞船,将要发射5号神舟载人宇宙飞船,那么“人类飞天为哪般?” 中科院院士王希季详细阐述说,陆、海、空、天是人类活动的四大疆域。陆,指陆地,对一国而言就指其领土。海,指海洋,对一国而言,主要指其领海。空,指包围地球的稠密大气层,一般默认其高度为航空器所能达到的最高高度(几十千米),对一国而言就 China has successfully launched four Shenzhou spacecraft to be launched on the 5th Shenzhou manned spacecraft, then “what is the human flying?” Wang Xijian, academician of the Chinese Academy of Sciences, elaborated that land, sea, air and sky are the four major human activities territory. Land refers to land and refers to the territory of a country. Sea, referring to the ocean, for a country, mainly refers to its territorial waters. Empty, refers to the dense atmosphere surrounding the Earth, the general default height of the aircraft can reach the highest height (tens of kilometers), for a country