It goes on to describe the make-up of our solar system and closes with information on space exploration. Water, food, or sleeping astronauts floating inside a spacecraft could damage the controls. Special foods, toilets, and sleeping gear must be used. Food that is taken into space is dried, or dehydrated. Dehydrated food does not spoil and takes up little room.
Water is added before eating.
Meal trays are fastened to the astronauts' legs. Dishes are attached to them by Velcro, and magnets hold the forks and knives. Space toilets use strong jets of air to blow wastes into a bag below the toilet. The wastes are dried and stored. To stay seated, astronauts slide their feet under bars at the bottom of the toilet and fasten straps across their legs.