中国空间站正式开建，商业航天如火如荼，地球人飞入太空越来越频繁。而就像20年前大家想象不出智能手机一样，技术发展速度往往远超预期，也许30年后普通人可以像坐飞机一样轻松便捷地遨游太空。
不过，不能凡事都往好处想，大家日常坐飞机尚且难免延误，在更神秘莫测的太空中，乘坐航天器难免出点意外，做好预案很重要。
中国空间站示意图
畅想一番，大家飞到了太空中的旅行地，正穿着舱外航天服体验真空，或者正在旅途中的航天器窗口前欣赏星河浩瀚，却突遇太空“风暴”（太空天气预报只会比地球上更不可靠），无法按时行动，出发时带上的食物却快吃完了，该怎么办呢？
换句话说，大家因为特殊情况滞留在太空某处，如何获得补给？
不少人一定脱口而出：“种土豆！”
不错，科幻作品给我们示范了不少情况，具体分成两大类。
其一，太空舱种植养殖。近年来，中国飞船多次携带地球作物种子上天。科研人员借助太空特殊环境，开展各类实验。得益于中国农业大国的“爱种菜基因”，中国终于建成了可重复使用的再生式生保系统，也就是说，可以在太空舱里重复种植蔬菜了。
畅想未来，太空游客们除了携带不影响人体和设备安全的食物制成品，肯定还能吃到新鲜的绿叶菜。
国际空间站的航天员已经品尝过太空辣椒玉米饼，随着太空舱种植事业再攀高峰，收获植物越来越多，太空舱内养殖小肥羊也不是天方夜谭，大家在太空说不定会有意外的口福。
国际空间站上种植的太空辣椒（照片来源：美国宇航局官网）
航天员制作的太空辣椒玉米饼（照片来源：美国宇航局官网）
其二，外星球种植养殖。中外科研团队利用月壤已成功培育出植物，随着太空发电项目提供越来越充足的能源，考虑到地球人的化学、生物技术进步，没准距离月壤大量培养出土豆等作物已经很近啦。
天文学家一直致力于在附近的星球上寻找水、土壤和氧气来源，毕竟水和氧气是地球生命存在的重要基础物质。科研团队已发现月壤中存在活性化合物，有望帮助合成氧气和氢气、甲烷、甲醇等燃料。
也许在不久的未来，利用外星球的物质，加上“调配秘方”，地球人真的可以学习“航天员马克·沃特尼”，在火星等太空旅行地开发出适宜环境，种植速生性植物。提高生活质量。如果当地建筑条件允许，养殖动物也有可能。
这些想法是不是很奇妙？其实，这么做的地球人都是“勤恳老实人”。
今天的机场、高速公路附近不缺少供应食物的服务区，未来太空旅行途中很可能已经开设了24小时便利店，物资由航天器定期补给，存货足够太空游客消耗很久。
假如存货有限，太空游客可以向地球或附近太空城发信号求援，相信那时已经发展成熟的中国可复用货运飞船会尽快送来补给。这应该是最可靠的办法，毕竟太空游客未必都是种菜达人。
随着货运飞船可重复使用能力不断提升，中国运送太空物资的综合效益会进一步提升，在空间站享用火锅、烧烤、小龙虾也不会是遥远的梦。
However, we cannot always hope for the best. It is inevitable that there will be delays in flying every day, and in the more mysterious space, accidents will inevitably occur when flying on spacecraft, so it is very important to make a good plan.
Schematic diagram of Chinese space station
Imagine that when you fly to a place of travel in space, you are experiencing a vacuum in your extravehicular spacesuit, or enjoying the vastness of the stars in front of the window of a spacecraft on your way, but suddenly encounter a “storm” in space (the space weather forecast will only be more unreliable than on Earth). Unable to act on time, but we are almost out of food when we set out, what should we do?
In other words, how can people get supplies if they are stranded somewhere in space because of special circumstances?
Many people must have blurted out, “grow potatoes!”
Yes, science fiction shows us a lot of situations, which are divided into two categories.
First, space capsule planting and breeding. In recent years, Chinese spaceships have carried earth crop seeds into the sky many times. Researchers carry out all kinds of experiments with the help of the special space environment. Thanks to the “vegetable-loving genes” of China’s big agricultural countries, China has finally built a reusable regenerative life support system, that is, vegetables can be replanted in the space capsule.
Imagine that in the future, in addition to carrying food products that do not affect the safety of the human body and equipment, space tourists will certainly be able to eat fresh green leafy vegetables.
The astronauts of the International Space Station have already tasted space chili tacos. As the space capsule planting industry climbs to new heights and more and more plants are harvested, it is not impossible to raise little fat sheep in the space capsule, and everyone may have unexpected benefits in space.
Space chili peppers grown on the International Space Station (photo: NASA website)
Space chili tacos made by astronauts (photo: NASA website)
Second, planting and breeding on other planets. Chinese and foreign scientific research teams have successfully cultivated plants by using lunar soil.As the space power generation project provides more and more energy, considering the progress of chemistry and biotechnology, it may be very close to the lunar soil to produce potatoes and other crops in large quantities.
Astronomers have been trying to find sources of water, soil and oxygen on nearby planets. After all, water and oxygen are important basic materials for the existence of life on Earth. The research team has found active compounds in lunar soil, which are expected to help synthesize oxygen, hydrogen, methane, methanol and other fuels.
Perhaps in the near future, with the material of other planets and the “secret recipe”, earthlings can really learn from “astronaut Mark Watney” and develop a suitable environment and plant fast-growing plants in space travel places such as Mars. Improve the quality of life. If local building conditions permit, it is also possible to raise animals.
Aren’t these ideas wonderful? In fact, the people on earth who do so are all “diligent and honest people”.
There is no shortage of food service areas near today’s airports and highways, and 24-hour convenience stores will probably have been opened during future space trips, with supplies regularly supplied by spacecraft and enough inventory for space tourists to consume for a long time.
If the stock is limited, space tourists can signal to the Earth or the nearby space city for help. It is believed that the developed Chinese reusable cargo spacecraft will send supplies as soon as possible. This should be the most reliable way, after all, space tourists are not all good vegetable growers.
As the reusability of cargo ships continues to improve, the comprehensive efficiency of China in transporting space supplies will further improve, and enjoying hot pot, barbecue and crayfish at the space station will not be a distant dream.
