推荐回答（5个）
我刚吃过饭就来回答这种问题……
太空中的洗手间也是无重力的。上厕所时，必须坐在精心设计的马桶上。人浮在半空中，两脚先放进固定的脚套里，腰间用座带绑好，用手扶着手柄（不然因为反作用力，便便一喷人就飞了……）。 如果是大便，不是用水冲，而是用一个特别的抽气机，将粪便吸进塑料盒里。每解一次，就会更换一个盒，这些盛着粪便的塑料盒会被弹到太空，或者带回地球处理。如果是小便，也是利用抽气机（早期飞船只有男式的，管状的，把JJ套进去），将其吸进一个特别形状的杯子里，经过橡皮管灌进地板下的污水池里。
有专用的厕所。
专门的厕所收集大便之后，将水分进行干燥处理，然后将剩余的大便要么集中管理，要么拍向外太空。
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