What would you eat if you went to Mars? NASA is planning the menu for it's manned mission to the planet in the 2030s. Six to eight astronauts are expected to go on the trip which will take nearly 2 and a half years. Travel to Mars may be far ( it will take six months to reach the planet) but there is a little gravity which means the astronauts will be able to chop vegetables and boil water. They will also have a hydroponic garden where they can grow the fresh veggies.