How hard is it for humans to land on Mars?

The scientific team of NASA discovered the existence of microorganisms on Mars, and they concluded that there must be liquid water underground on Mars, and its composition was bittern. Sure enough, Italian scientists who discovered the groundwater on Mars said that because liquid water is under the extremely deep ice sheet, its hydrological environment is extremely harsh and cold, which is not suitable for microbial survival. Because it contains a lot of magnesium, calcium and sodium, the water can still remain liquid at a temperature much lower than the freezing point of pure water. Fred, a researcher at the Australian Observatory? Watson said? It is fatal to any microorganism to keep the liquid salt concentration of water below freezing point, even at MINUS 5 or 6 degrees Celsius. ?

NASA has always been cautious about Mars exploration, keeping a low profile, because they know that exploring Mars and landing on Mars are two completely different things. Even if the current high-thrust rocket is upgraded for three times, it will take more than three months to go to Mars one way with thermonuclear rockets and efficient chemical engines. Not to mention the difficulties on earth, the key is how to transform the Martian environment so that it can accept human visits and survival. Is that everything goes well, it will take at least one year for human beings to get the necessary fuel to return to earth after landing on Mars. In the absence of air, water and food, it is also a difficult problem for astronauts who have settled on Mars to survive. It is these countless difficulties that determine that it will be a long process for humans to land on Mars.

if you want to know more about Mars scientifically and in detail, and the difficulty of landing on Mars, you'd better go to a sci-fi blockbuster? Mars rescue. This is a super realistic sci-fi blockbuster with a solid scientific foundation, which truly simulates NASA's manned trip to Mars. In other words, NASA, as a consultant, directly participated in the filming of this film. Even so, when asked by the media when humans can immigrate to Mars, John, deputy director of NASA? Grunsfeld still said:? The atmosphere of Mars is extremely thin, and the oxygen content is almost zero. Mars soil is dry and hard, and contains no microorganisms. Even if a practical solution is found, it will take a century or two to get the air and soil of Mars close to the Earth. If you have to ask me when humans can immigrate to Mars, I can only say that it will take many, many years, and only if our interest and investment in exploring Mars are increasing. ?