在目前的太空飞行中 ,失重状态下易使宇航员患上了骨质疏松症。在持续 4～ 6个月的飞行中 ,宇航员体内骨质的密度每个月会降低 1 6 %。如果按照这个速率降低下去 ,科学家估计 ,在两年半的火星旅行中 ,宇航员骨质的密度将降低一半 ,那将是可怕的骨质疏松症。宇航员对太空中骨质 In the current space flight, astronauts are prone to osteoporosis in weightlessness. During the 4 to 6-month flight, the bone mass density of astronauts is reduced by 16% every month. If you follow this rate down, scientists estimate that in two and a half years of Mars travel, astronaut bone density will be reduced by half, it will be terrible osteoporosis. Astronaut on the bone in space