Why is Mars sometimes near and sometimes far away?

The universe is vast, and there are countless mysteries waiting for us to explore. Despite the rapid development of science and technology today, the only way we can observe the universe is the space telescope. If we want to learn more about the mysteries of the universe or planets, landing exploration is very necessary. We humans first landed on the nearest planet moon. With the development of science and technology, landing on the moon is not something that many countries are scrambling to do now. Mars is our latest goal. How far is the earth from Mars? Sometimes it is close at hand, sometimes it is a world of difference!

As we all know, compared with other planets, Mars and the moon may be the most suitable planets for human migration in the solar system today. We have learned enough about the environment of the moon, but there are still many mysteries about Mars before us. We humans have also made many contacts with Mars. The earliest contact with Mars was in 1965. Mariner 4 launched by NASA undertook the mission of exploring Mars, and flew into space and to Mars.

In the following time, the Mariner series detectors were constantly updated. In this process, the flight speed of the detector is getting faster and faster. In the hands of Mariner 7, it took only 128 days to reach Mars. After that, Mariner 9 successfully flew into the orbit of Mars on 168, which is of great historical significance.

1 On August 20th, 975, the American Viking1was launched. After a long time of 304 days, Viking 1 successfully landed on Mars. After that, the flight time of the plane is very long. Many people here will ask why the speed of flying to Mars is getting slower and slower with the development of science and technology. In fact, this is a good explanation. People don't just launch Mars probes to reach Mars. Reaching Mars is only the most basic step, and then we have to explore the environment and various conditions on Mars, which means we need to carry a lot of equipment, so relatively speaking, we have to keep the aircraft stable under heavier conditions, which is our goal, so the time will be so long.

The distance from Mars to the Earth is only higher than that of Venus, and it is closer to the Earth. According to relevant data, when the Earth and Mars orbit the sun and reach the perihelion, the distance between the two planets is the closest, about 54.6 million kilometers, but this is only theoretical data. According to scientists, when two planets run to perihelion, the distance is 400 million kilometers!