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On November 22, 1971, human messengers first landed on Mars.
The planet is now one of the nine most distant planets in the solar system, the fourth in sequence in terms of the distance from the sun; this is also the average distance from the sun is 1.52 astronomical units, that is, 22.794 million kilometers. The equatorial diameter is 53 percent of the Earth's absolute diameter, the mass is only 11 percent of the Earth's desert. Since its surface is 3.9 times the water, it has always been thought that the sun is the most likely planet in the solar system, the rotation cycle is 687 hours and 37 minutes. There are also four seasons on the planet, so there is probably six months of life on the sun, so there are no people on the surface of the planet like the moon, but there is no one on the planet to fly to Saturn for years? This is the first time that the star is


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