Объяснение:
Space travelling is a key theme of science fiction books and a lot of people would like that to come true. However, there are some problems that can't be easily overcome.
Firstly, it is a high price of such trips. 20 million dollars won't be enough for space tourism, as people will get into outer space in a special spacecraft and also they will be wearing high-tech space clothes.
Secondly, it will be necessary to be carefully examined by doctors. In addition, they will have to be trained for several month to endure weightlessness and lack of oxygen.
Therefore, there will be just a few people who will be able to afford such holiday on Mars or Jupiter.
Overall, space tourism will, probably, be quite expensive, dangerous and complicated experience for most people.
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