Science Fiction Network, December 26 (Xu Mingyang) According to CCTV News , Mars ushered in the vernal equinox on December 26. The arrival of the vernal equinox means that Mars has entered a new year. On this day, the length of day and night on Mars is basically equal. The northern hemisphere enters spring and the southern hemisphere enters autumn.
In ancient my country, Mars was called Yinghuo, which means "Yingyinghuo, separated and confused". This name is rarely used now. Mars has two natural satellites: Phobos and Deimos . The average temperature on Mars is about -55°C, and its maximum temperature difference is close to 160°C. Mars has a diameter of 6779 km, about half that of Earth, and its surface area is about the same as the land area on the Earth's surface. The closest distance between Mars and Earth is about 55 million kilometers, and the furthest distance can even exceed 400 million kilometers.
Like the Earth, Mars also rotates and revolves. The tilt angle of Mars' rotation axis is 25.19 degrees, the rotation period of Mars is 24 hours, 37 minutes and 22.7 seconds, and the revolution period of Mars is about 687 Earth days. In other words, one Martian year is approximately equal to 1.9 Earth years. According to experts, the Martian chronology began in 1955 on Earth, and this year is the 37th New Year on Mars. Because Mars' orbit is flatter, its four seasons are more unevenly distributed. Research data shows that the spring and summer in the northern hemisphere of Mars are about one-third longer than the autumn and winter.
Mars has many similarities with the Earth. As early as the 1960s, people began to explore Mars. People hope to understand the evolutionary history of Mars through the detection of Mars topography, Mars magnetic field , groundwater, soil composition and distribution, Mars atmosphere and climate change. The causes of climate change on Mars may have important reference significance for the protection of the earth's climate environment.
