For astronauts To grow fresh food they have things called hydroponics. This is a machine that can make plants grow in any conditions all season round so the astronauts have fresh food. They have invented a new sort of refrigerator called gravity refrigerators which helps keep food for a very long time. The food that they take up into space, they deep freeze and they keep it deep frozen. They can only deep freeze the food once. Deep freezing keeps the food from going mouldy by keeping it so cold it can’t grow mould.
