Green explains about how suction systems are used to cater to the needs of astronauts and while some of the waste is made use of on ISS for life-essential systems, the rest goes back to Earth. Green says in his video; ‘As you might imagine, it is a little bit tricky.’
We make use of toilet seats that have a diameter of 12-28 inches whereas in space the astronauts must do with an opening that is about 4 inches wide. Restraints are used to hold astronauts down to the seat and this ensures that no waste escapes. In order to train astronauts for this, NASA has particular exercises and training sessions
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