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14

In addition to the vegetarian and even vegan astronauts mentioned elsewhere, there soon may be more. In at least one of many possible scenarios for food on long flights, NASA astronauts on the proposed Mars mission for 2030 will be on vegan diets. The need for sustainable food options and preservability of the food is driving this choice.

10

Several points come to mind: In most sci-fi there is gravity. At the moment we do not have a non-earth location where humans can go with gravity. If we have habitats on the Moon or Mars then there will be a degree of gravity and the situation can change. We have not yet constructed a vast spinning space station with artificial gravity as depicted in 2001 A ...

8

As astronaut is always to choose the food of his/her own choice . They have a tasting period of 15 days to eat and choose what foods he/she likes to eat in space and the food choice has to meet the standard for rocket travel though. Of course there will be moderation by nutrition experts to ensure the astronaut is getting the recommended diet value of car/...

8

Most foods cooked in space are not brought up to a complete boil because dealing with the steam would be an issue. Currently they inject hot water into vaccuum sealed pouches containing food. I would expect that instead of a zero G rice cooker, spaceX would send par-cooked rice or instant rice that only requires hot water to be added. Instant rice is pre-...

8

In addition to Brian's points (which are both correct), it's actually a misnomer that astronauts eat only dehydrated "space food". Modern food that is shipped to the ISS, for example, is actually quite good. It's still tricky to cook, but they get plenty of raw fruits and vegetables, among other things. From this TIME article: Today, the most elaborate ...

2

You will have to build a solar cooker to cook your hot dogs in space at 1 AU from the Sun. I can't vouch for all aspects of the physical behavior of the hot dog, but I think this can be done. In this answer I explain the equation for an estimate of the equilibrium temperature of a blackbody heated by visible light, and radiating in infrared light. T \...

2

Space is a very sensitive environment and the mission control usually likes to be in control of everything and hence it's heavily monitored. Small particulates that can escape and clog filters, hot fluids that can't be recycled and/or accurately modeled in a flow within space stations or in space are generally not preferred. You can actually see with many ...

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