NASA began to provide weather forecast for Mars at 438+09 EDT on February 6th. What does this mean?

Mars is one of the eight planets in the solar system, the fourth planet from the inside out, belonging to the earth-like planet. Its diameter is about 53% of the earth's and its mass is 1 1% of the earth's. Due to the axial tilt, the rotation period is similar to that of the earth, and one circle is about twice that of the earth. The orange appearance is the surface hematite (iron oxide). In China's ancient books, Mars was called "the twinkling star", while in ancient western countries (ancient Rome) it was called "the star in the myth of Mars". Mars has two natural satellites: Phobos and Phobos, which are irregular in shape and may be captured asteroids. On earth, Mars is visible to the naked eye, with the highest brightness reaching -2.9. Among the eight planets, it is darker than Jupiter and Venus. On September 28th, 20 15, NASA announced the existence of running water on Mars.

On July 25th, 20 18, AFP reported that the first liquid water lake was found on Mars.

The star is the fourth planet in the solar system from the inside out.

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. The West calls it Mars Mythology Star, God of War and China call it 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.

The distance from Mars to the Earth

However, according to astronomers' calculations, during the 800 years from 1600 to 2400, the distance between Mars and the Earth can only rank third. According to the calculation results, by September 2, 2366, the distance between them was about 557 10000 km. By August 28, 2287, the two will be closer, with a distance of about 55.69 million kilometers.

Generally speaking, the year when Mars is close to the Earth is the best time to land on Mars and observe it on the ground.

Mars culture

Mars is called the god of war in the west, perhaps because of its bright red color, so Mars is sometimes called the "red planet". (Before the Greeks, the ancient Egyptians once worshipped Mars as a god of agriculture. Later, the ancient Greeks regarded Mars as Ares, while the ancient Romans inherited the Greek myth and called it "Mars Myth". In Norse mythology, Mars is Tyr, the god of war. And the name of March also comes from Mars. )

Mars was called "fluorescent star" in ancient China, because it is red and fluorescent like fire, which symbolizes fire in the five elements, and its brightness often changes; And in air movement, sometimes from west to east, sometimes from east to west, the situation is complicated and chaotic, so China called it "Yingying" in ancient times, which means "Yingying firelight, leaving chaos".