Can Mars be inhabited by humans?

The atmosphere on Mars is thin, only 1% of that on Earth. It is mainly composed of carbon dioxide (95.3%), nitrogen (2.7%), argon (1.6%), trace oxygen (0. 15%) and water vapor (0.03%).

Compared with the earth, the geological activities of Mars are relatively inactive. Most of the surface landforms were formed in ancient times, with dense craters, volcanoes and canyons, including Mount Olympus, the highest peak in the solar system, and Mariner Canyon, the largest canyon. Another topographical feature is the obvious difference between the northern and southern hemispheres: the southern part is an ancient highland covered with craters, while the northern part is a younger plain.

Extended data Mars is about half the diameter of the earth, with a volume of 15% and a mass of 1 1%. Its surface area is equivalent to the land area of the earth, but its density is much less than that of the other three terrestrial planets (Earth, Venus and Mercury). ?

In terms of radius, mass and surface gravity, Mars is about halfway between the earth and the moon. Mars is about twice the diameter of the moon and half the diameter of the earth. Its mass is about 9 times that of the moon and19 of the earth, and its surface gravity is about 2.5 times that of the moon and 2/5 of that of the earth.

Mars is the fourth planet in the solar system from the inside out, belonging to the earth-like planet. Its diameter is about half that of the earth, and it takes twice as long to make a revolution tilted from the axis with a similar rotation period.

In the west, it is called Mars Myth Star and God of War, while China is called Fluorescent Star, because it is as bright as fire, and its position and brightness often change. Its orange-red appearance is because the surface is covered with hematite (iron oxide), and the prefix areo- is Mars in English. Mars was once considered to be the most likely planet in the solar system to have extraterrestrial life.

Mars is basically a desert planet, with sand dunes and gravel all over the surface and no stable liquid water body. The atmosphere dominated by carbon dioxide is thin and cold, and dust is suspended in it, and dust storms often occur every year. Compared with the earth, the geological activity is inactive, and most of the surface landforms formed dense craters, volcanoes and canyons during the active period in ancient times.

Including the highest mountain in the solar system: Olympus Mons and the largest canyon: Mariner Canyon. Another unique topographical feature is the obvious difference between the northern and southern hemispheres: the southern part is an ancient highland covered with craters, while the northern part is a young plain. Both poles of Mars have polar caps mainly composed of water and ice, and the dry ice covered on them will fluctuate with the seasons.

Baidu Encyclopedia-Mars