Heavenly Trailer | Planetary Moon, Pluto rushing to the sun, summer night observation is just at the time

The celestial phenomenon that will appear next week will be the Neptune on July 18, Jupiter on July 19, July 20 Pluto, July 22, Mars, and July 22nd. The next string month will appear at 22:19 on July 20. In addition, the heat of the twenty -four solar terms will appear at 4:07 on July 23.

The summer summer is the last solar terms of summer. The sun reaches 120 ° of the Yellow Meridian, and the festivals are made between July 22 to 24 each year. Before and after the "Midtu" in the "Sanfu Sky", high temperature, humidity, and rain are the most dull and humid season of the year.

Mars

Next week, there are many elephants, but they are all planets and the like, and the ornamental is not very strong. The most noteworthy of these is the Mars Moon in the early morning of July 22. This time the moon is actually a moon covering Mars, that is to say, in some areas of the earth, the moon can be seen to block the moon. Even if the phenomenon of the Mars in other regions does not observe the moon, you can see that the moon is quite close to Mars. The location of Mars that can be observed this time is in the northeast of Asia. In some areas such as Heilongjiang and Jilin in northeast my country, the second half of the covering is the phenomenon that Mars comes out from the back of the moon. The time is 7 Late at night on the 21st. In other parts of our country, during the whole period of food, the moon is below the horizon, so this month can not be seen at all. At this time, it has passed the next month, and about 40%of the moon's appearance is illuminated.

At the beginning of the concealment, Mars entered behind the moon from the bright surface of the moon. At this time, for all parts of my country, the moon has not been seen yet. After a period of time, Mars appeared again from the dark side of the moon. In my country, only the moon in Heilongjiang and Jilin has just risen, and the process of seeing the end of the stars can be seen, that is, the phenomenon that Mars appears again from behind the moon. In other areas, the moon is still below the horizon, and it is still impossible to observe. When the stars are covered by the moon, the star will appear completely from the back of the moon at once. Because Mars has a small view of view, it takes nearly 20 seconds to come out from behind the moon. Therefore, Mars looks like gradually changing. Light.

In the early morning of July 22, Mars and Mars and the Moon Relators are schematic

Picture source: Star Map Software

For observer in Beijing, although it is impossible to appreciate the process of the moon covering Mars, a few minutes after midnight, you can see the moon rise from the east to the north. The red Mars with 0.3, etc. is on the right side of the moon, only half the distance. In other parts of our country, the later the moon rises west, the later, the farther the Mars is from the moon, but it is basically within 1 degree. The distance between the two is so close to it and it is worth seeing.

Pluto

Pluto on July 20

Picture source: Star Map Software

There is also a phenomenon next week, that is, Pluto, which happened on July 20. Pluto's brightness is only 14.3, which is too dark. Generally, the general small astronomical telescope is powerless. Therefore, this natural elephant is unable to observe most people. It can only take this opportunity to understand Pluto.

Pluto

Pluto once ranked among the planets and was the ninth planet of the solar system, but it was later cleared to play the planet team and downgraded into dwarf stars.

Before the telescope appeared, people only knew that there were five bright planets such as gold, wood, water, fire, and soil in the solar system. In 1781, British astronomer William Huthell discovered Uranus with a telescope. Later, astronomers found that the actual observation position of the King Star always had a certain deviation from the results calculated by the mechanical formula. Some people thought that it was because there was an unlimited planet. Send position deviation.

In 1846, the young French astronomer Livier calculated the position of the unknown planet and discovered the Neptune. However, the discovery of Neptune did not completely solve the problem. Remove the impact of Neptune on the King of Heaven. The calculation location and observation results of Uranus still cannot be fully consistent, and the movement of Neptune is not normal, and it seems to be disturbed. People continue to be large but speculate that there may be a big planet that interferes with the movement of the king and Neptune outside the track of Neptune. Some astronomers estimated the position of this unknown planet and began to observe the search, but they never succeeded.

On January 21, 1930, the young American observer, Claide Tangbo, monitored hundreds of thousands of stars after a year of hard work and finally found a new planet in Gemini. This is Pluto.

The brightness of this planet is very dark, only about 15, and there is a large gap between brightness and orbiting from the prediction results. Some people think that this discovery should not be the credit, it may be just a coincidence. Because Pluto's head is too small, it is not enough to have much impact on Uranus and Neptune. Pluto's diameter is only about 2,300 kilometers, which is much smaller than the moon, only 17.7 % of the quality of the moon, and 0.22 % of the earth quality. Since 1992, several celestial bodies that are similar to Pluto have been found near Pluto's orbit, and some are even larger than Pluto. This has severely shaken its planet status. In 2006, the International Astronomy Federation re -defined the planet, so that Pluto did not meet the conditions of continuing to be the planet, and was classified as dwarf planets.

(Beijing Astronomical Museum)

Public account name: Beijing Institute of Science and Technology Research Institute WeChat: BJAST-WX

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