During the solar eclipse in 2020, China can see cities passing through provinces and cities: China, central Tibet, central Sichuan, northern Guizhou, central Hunan, southwestern Jiangxi, southeastern Fujian and central Taiwan Province.
Solar eclipse in June 2020 The most interesting astronomical phenomenon in 2020 is the annular solar eclipse on June 2 1 day. Nonsense, the last annular eclipse in China was in 20 12, so this year's annular eclipse is worth looking forward to. When the moon moves between the earth and the sun, if the three are in a straight line, the moon will block the light from the sun to the earth. The phenomenon that the sun is partially or completely blocked by the moon is called an eclipse. When the moon is illuminated by the sun, there will be a shadow in the direction away from the sun, which is called the moon shadow. The moon is divided into umbra, penumbra and pseudoumbra. Umbra refers to a place that is not directly exposed to the sun. It is actually conical in space, so it is called umbra cone. Penumbra is an area that is only partially exposed to direct sunlight. Pseudo-umbra refers to the vertebral body obtained after the cone of umbra converges to a point.
According to the different positions of the moon, the eclipses observed by observers can be divided into three types: partial eclipse, total eclipse and annular eclipse. The moon orbits the earth in an elliptical orbit, so the distance between the moon and the earth changes from far to near. When the moon is far away from the earth, the umbra cone cannot reach the earth, but the pseudoumbra cone formed by the extension of the lunar umbra cone sweeps a part of the earth. At this time, visually, the moon is smaller than the sun, so when you look at the sun from the pseudo-shadow area, you can see a halo with the center blocked and the surrounding light blocked, that is, an annular eclipse. According to Hu, the annular eclipse belt starts from the northern Democratic Republic of Congo, passes through Central Africa, South Sudan, Ethiopia, Eritrea, Red Sea, Yemen, Saudi Arabia, Oman, Pakistan, India and China, and ends in the western North Pacific. Fortunately, the solar eclipse belt runs through China, Tibet, Sichuan, Guizhou, Hunan, Jiangxi, Fujian and Taiwan Province provinces. The public in these places can see the rare spectacle of annular solar eclipse, while other areas can only see partial solar eclipse. "We just need to wear a special observation mirror to observe the solar eclipse with the naked eye. If you want to record the solar eclipse, you can use an ordinary camera with a telephoto lens and a zoom lens of 200 mm -400 mm " Hu said:
For the public, the solar eclipse is an astronomical phenomenon worthy of appreciation. For astronomers, solar eclipses also have great scientific value. Due to the occlusion of the moon, the outer layer of the sun, which was originally difficult to observe, can reveal its true characteristics, which is of great significance to the study of the sun. Scientists will also observe through radio bands, and even partial and annular eclipses can obtain important information about the atmospheric level of chromosphere and corona and the local sources of radio.
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