After Comet Xinzhi in 2020 and Comet Leonard in 2021, another comet worthy of expectation has entered the public's view. Astronomical science experts said that comet C/2022 E3 is currently "approaching" the earth, and the Chinese public is expected to see the figure of this "alien" with the naked eye in a place with good observation conditions. This is the comet Leonard taken in Lijiang, Yunnan on December 21, 2021. (Courtesy of Xingyuan Mountain Wind Team) Comet C/2022 E3 was first observed and discovered by the Zweiki Transient Research Facility in March 2022. Xiu Lipeng, member of the Chinese Astronomical Society and director of the Tianjin Astronomical Society, said that although the comet was small, it would be closer to the earth. According to the data, in January 2023, comet C/2022 E3 moved from the constellation Corona Norris to the constellation Leopard through the constellation of Hercules, Draco and Ursa minor, with a very fast speed. In December 2022 and January 2023, astrophotography enthusiasts took pictures of the comet. According to the released photos, the comet is emerald green with bright and broad tail. This is the comet C/2022 E3 taken by Feng Guodong, an astronomer in Beijing, in the early morning of January 3, 2023 in Shangri-La, Yunnan. (I provide the picture) On February 2, 2023, comet C/2022 E3 will pass the perigee, about 0.28 AU from the earth (AU refers to the average distance from the sun to the earth, about 150 million kilometers). "When passing the perigee, according to the prediction, the brightness of comet C/2022 E3 may reach Grade 5, but the bright moonlight will affect the observation. The interested public in China can choose the opportunity to observe in the last week of January. During this period, the comet will move to the vicinity of the northern celestial pole. For the northern region of China, the comet will not fall all night and can be observed. The best observation time is from the late midnight to the dawn. When the astronomical morning light starts, the comet is located in the north Above the polar star, the horizon height is the highest and the observation conditions are the best. It is better to choose a place without light damage, such as suburbs and mountains. Before observation and shooting, you can use Tiantiantong App, applet or light pollution map to query. The effect of naked eye observation alone is not very good. You must bring binoculars or small telescopes to see more clearly. " Xiu Lipeng said. Comets are small bodies in the solar system, mainly composed of water ice. Most comets are dim and bright enough to be seen with the naked eye. For example, comet Xinzhi in 2020 is rare. This is Sun Si, an amateur astronomer in Beijing, who shot the comet Xinzhi in Huairou, Beijing, on July 19, 2020. (I provide the picture) Xiu Lipeng said that the comets worth seeing could not be met, because there are too many uncertain factors, such as the "comet of the century" ISON and comet C/2019 Y4, which once attracted the global public's attention, all disintegrated before reaching the "high light moment", which is regrettable. This is Lu Shupei, an amateur astronomer in Beijing, who shot the comet Xinzhi in Mingantu, a white flag in front of Inner Mongolia, on July 14, 2020. (I provide the picture) "Comet C/2022 E3 is a long-period comet, which is doomed to us