According to NASA’s data, foods are first tested for nutritional value, how well they freeze dry, the storage and packaging process, and of course taste. Astronauts are also asked to taste test food items. They use a simple form to rate the products on such things as appearance, color, odor, flavor, and texture. These components are rated using a numbering system, states NASA data. The Food Systems Engineering Facility uses the astronauts ratings to help design better space food, states the website. There are eight categories of space food that help keep the astronauts safe and healthy on missions. Take a look.