Can humans land on Mars? How long does it take from the earth to Mars?

It has been half a century since man landed on the moon for the first time, and he is eager to land on other planets again. Mars is a new milestone in exploring the universe. Of course, the completion of this pioneering work will never be smooth sailing. We will certainly face and solve many difficulties. How difficult is it to land on Mars and immigrate to Mars?

If you want to land on Mars, you must first know what kind of planet Mars is. The diameter of Mars is only 1/2 of the Earth's, and its mass is about110 of the Earth's. Among the planets in the solar system family, it is only a little bigger than Mercury, and the volume of Mars is only 15% of that of the Earth. But most of the earth is oceans. As far as the actual land area is concerned, Mars is similar to the Earth.

On Mars, you can spend more than half an hour than on Earth. The period of revolution of Mars is 687 days, about twice as long as that of the Earth. The inclination of Mars is 25. 19 degrees, which is close to the earth, so Mars also has four seasons, but the four seasons of Mars are twice as long as the earth. The gravity of Mars is only 0.38 of that of the earth, so elephants can also be high jumpers on Mars.

We take the distance from the earth to the sun as an astronomical unit, and the distance from Mars to the sun is about 1.52 astronomical units. Although there is a lot of carbon dioxide on the surface of Mars that can create greenhouse effect, the atmosphere is very thin, only one millionth of that of the earth. Moreover, 96% of the Martian atmosphere is carbon dioxide, which makes it impossible for humans to breathe and heat. It remains on the surface of Mars, so the temperature difference between day and night on Mars is very large, reaching 30 degrees Celsius during the day and only MINUS 140 degrees Celsius at night.

Such an environment is not suitable for immigrants. But it is by far the second planet in the solar system most suitable for human habitation. Before that, humans also tried to launch many Mars probes. These probes have gradually deepened scientists' understanding of Mars. It is becoming more and more difficult to explore Mars, but there is still a long way to go to achieve manned landing on Mars. So what are the difficulties to overcome when manned to Mars?

Of course, we must first meet the safety of astronauts. Life support system is necessary. Of course, we also need enough living space, fuel for the whole process, experimental equipment for research and so on. When you arrive at Mars, if you want to land on the surface of Mars, you will land on the spaceship and return to Earth. You need to join the Mars orbital module in the ascent and fly back to Earth. When the probe reaches the predetermined orbit of Mars, the speed, the distance between the flying angle and Mars, and the gravitational force on Mars in orbit must obey Newton's law. Only in this way can the probe fly around Mars according to the predetermined orbit, and the ultimate risk is the death stage called the seven minutes of terror, in just seven minutes. The speed of the detector should be reduced from 20 thousand kilometers per hour to zero. After many tests, first prepare to enter the atmosphere, then the detector will receive the final landing parameters, and once the parameters are wrong, it will crash.

After a manned rocket is launched from the earth to return to the earth, no matter what happens at any stage, it must be rescued immediately by the astronauts themselves, and the earth cannot give any rescue. Because even if the radio wave is close to the speed of light, the one-way transmission will take 13 minutes, and it will take 26 minutes to arrive, which is too late. So how long does it take from the earth to Mars? The nearest distance from the Earth to Mars is about 55 million kilometers, and the farthest distance can reach nearly 400 million kilometers.

It may be hard for you to imagine the distance of 400 million kilometers, which is 1000 times that of the earth to distance to the moon. It took us three days to get to the moon in the past. You can refer to it and compare it.