Name five methods of food preparation for travel in space?

1. Irradiation: This method uses high doses of ionizing radiation to reduce the number of microorganisms in food. It can be used on any type of food item, but it can also affect the taste and texture.

2. Freeze Drying: This process involves freezing the food at a low temperature and then removing the water vapor by sublimation. This can be done at a higher temperature than freeze-drying, which may affect the taste and texture less. Freeze drying is often used for meat and vegetables.

3. Vacuum Packaging: This method involves removing the majority of air from a package before sealing it. This helps to prevent the growth of microorganisms and preserve the quality of the food. It is often used for processed meats, cheeses, and baked goods.

4. Retort Pouches: These pouches are heat-sealed and then retorted, or cooked under high pressure and temperature, to sterilize the food inside. This method can be used for a wide variety of food items, including meats, vegetables, and stews.

5. Freeze Dried Snacks: Freeze dried snacks are a common food item taken into space. They are lightweight, have a long shelf life, and do not require refrigeration.