• Life support system. The backpack on the back of the spacesuit contains oxygen that astronauts breathe and that pressurizes the suit, a regulator to keep the correct pressure, a fan that circulates oxygen, electricity for the suit, a two-way radio, water for the cooling garment, and a pump that circulates the chilled water.
• Communications system. New suits include an audio system inside the helmet.
• Helmet. It serves as a pressure bubble and ventilation system and has a small foam block to scratch the nose. A protective visor on the outside works like sunglasses.

Space exploration includes two kinds of spacesuits:

• One is worn inside a spacecraft during launch and ascent to space, during re-entry into Earth’s atmosphere and during landing.
• The other kind is designed specifically for spacew...