How was Mars formed?

August 27th is the closest moment for Mars to the Earth for more than 50,000 years. On August 29th, Mars, the Earth and the Sun lined up in a straight line in turn, making it the closest day for Mars to the Earth in history. We look forward to this day, because we have another chance to get in touch with the still strange space, only once in 50 thousand years.

launch

Mars running wild

The distance between Mars and the earth, which attracts worldwide attention, is getting closer every day, and it rises to the zenith at midnight, becoming the brightest celestial body in the night sky except the moon and Venus. According to reports, on August 27th this year 17: 00 (Beijing time), Mars will be the closest to the Earth in the past 50,000 years, and also the closest to the Earth in the next 2 1 century and the 21st century.

At 2 am on August 29th this year, Mars, the Earth and the Sun lined up in a straight line in turn, making it the closest to the Earth in history. At that time, the distance between Mars and the Earth was less than 5576.

Ten thousand kilometers. The next time you want to see a Mars impact at a closer distance than this one, you have to wait until 2287.

August 30(th), 2008

Mars rush means that the sun, the earth and Mars are on the same meridian. This astronomical phenomenon is called "rushing to the sun" or simply "rushing". The "rush" of the nearest distance to Mars is called "big rush". Experts believe that a rare Mars collision will occur every 79 years. 1766

August, 1845

August, 1924

August 2003

August 2008 and 2082

In August 2008, the brightness of Mars reached minus 2.9 magnitude (magnitude is an astronomical representation of the brightness of stars). The smaller the magnitude, the brighter the star, and the brightness of the moon at full moon is equivalent to negative 12.6.

Order of magnitude; The sun is the brightest celestial body we have ever seen, with a brightness of minus 26.7.

Orders of magnitude).

How to observe

Astronomy lovers can observe "Mars rushing to the sun" in three ways. One is to choose a place with low latitude. In China, Hainan Island has an excellent observation position, and Shenzhen is also favorable for observation. The second is to choose a place and time with less pollution, sunny weather, stable atmosphere and no moon. Note: The observation was very good for a few days around August 29th. During this period, the moon phase is in the transitional period from the waning moon to the new moon and the eyebrow moon. People can't see the moon or seldom see it. Mars will be the brightest star in the night sky. Third, it is best to prepare an astronomical telescope with a magnification of 150-300.

It is better to be about 10 times. Note that the larger the magnification, the better, because the instability of the atmosphere will also be enlarged when Mars is enlarged, which will bring ambiguity to the observation.

Observe what? One is the polar cap of Mars. There are white areas in the north and south poles of Mars, which are called polar caps. Mars is covered with a rust-colored desert, usually red, and the polar cap is white. This year, the southern hemisphere of Mars is in summer, and the Antarctic crown will become smaller and smaller, and vice versa. The second is sandstorm. The main component of the Martian atmosphere is carbon dioxide, and its pressure is1150 of that of the earth. There are often violent sandstorms in rust-colored deserts. Sandstorms on the earth can't compare with them at all. Astronomers are worried that if the sandstorm is serious or lasts for a long time during this sand washing, it will affect human observation of Mars. The third is the typical landform. For example, Mount Olympus, the largest volcano in the solar system, is 600 kilometers wide at the bottom and 26 kilometers high, which is three times that of Mount Everest, the top of the earth. There are many craters on Mars; Then there is the Grand Canyon, which extends horizontally for several kilometers, equivalent to the distance from Shanghai to Tibet. Only one black line can be seen in the telescope, which is mistaken for its "canal". This paper combs Lu Jing.