August Starry Sky, ushered in "star -rated" meteor shower

After the beginning of autumn, the weather gradually became cool, especially when watching stars at night, there would even be a burst of coolness, so pay attention to keeping warm when watching stargazing. The starry sky in August is wonderful. In addition to the previous planets and star sky, we will also usher in a "star -rated" meteor shower, which is worth looking forward to.

August 12 Yingxian Meteor Shower

The Yingxian Meteor Shower is one of the three largest meteor shower in the northern hemisphere, and the other two are Gemini Meteor Shower and Elephant Meteor Meteor Shower. Both meteor shower occurs in the coldest winter in the northern hemisphere, which is not easy to observe. The Yingxian meteor shower appears in summer, and the observation conditions are relatively comfortable.

The active time of Yingxian's meteor shower from July 17th to August 24th, which lasted more than a month. Generally, the meteor traffic reached a large amount of meteor flow around August 13, and the maximum sky traffic could reach more than 100 per hour. This year, the great period of the Yingxian Meteor Shower Forecast appeared in the early morning of August 13, Beijing time, so it was more suitable for watching from the evening of the 12th to the early morning of the 13th. In this season, shortly after dark, Yingxian will rise from the horizon of the northeast. At this time, the meteor rain radiation point is low, and the number of meteors can be seen will not be too much; near midnight, the Yingxian seat has risen to rise. In the air, the number of meteors that can be seen will increase; after midnight, the radiation point of meteor shower will continue to rise. At this time, it will usher in the great period of meteor shower, which is the best time to observe.

However, the impact of the city's light interference on observation of meteor shower is still great, so it is best to choose the suburbs. In addition, this year's Yingxian meteor shower coincides with the full moon, and the strong light of the full moon will seriously affect the observation of meteor shower. Some darkest meters will be submerged in the moonlight, and the number of meteors that can be observed will be greatly reduced.

It should also be reminded that the safety of watching meteor shower is the first place. You must be familiar with the observation location in advance and pay attention to bringing warm clothes. In addition, mosquito bite in summer is also a trouble, it is best to bring mosquito -repellent drugs.

Observation of meteor shower generally does not need to carry any equipment. This is because the visual range of the telescope is too small, but it is not suitable to observe meteor. At that time, meteors may appear in any direction in the sky, so the field of vision must be widened. To remind everyone, standing up and watching meteor shower, it will soon be sour around the neck, and it will be more comfortable to take a sitting or lying posture, so it is best to prepare a chair or moisture pad.

The meteor speed that belongs to the Yingxian Meteor Group is as high as 59 kilometers per second, and the time to pass the night sky is only a few seconds. It is fleeting. It may disappear if you exclaim. However, after some of the brighter meteors flashed, there will still be more than a few seconds, and "convenient" people wish.

Saturn on August 15th

On August 15, we will usher in the phenomenon of Saturn's rushing in the sun. What is Chongri? Saturn runs around the sun outside the orbit and is called an external planet. When the layman stars are running in the sky, the location of the sun and the earth will continue to change. We see that the time and location of their appearance in the sky on the earth are constantly changing. When the earth is running between the foreign planet and the sun, at this time, the external planet is on the line, the earth, the sun is on a straight line. From the earth, these two celestial bodies are far away. At this time, you can be called the planet. The rushing day will only happen to the layman star, and the two internal planets of Mercury and Venus will not occur, because they are running within the orbit of the earth and will never run outside the earth's orbit.

Therefore, Saturn's rushing in the sun does not mean that Saturn rushes to the sun. On the contrary, when the sun is the most angle between the two, it is similar to the location relationship between the sun, the earth, and the moon during the full moon. The distance between Saturn and the earth during the sun reached the closest, Saturn's brightness was the brightest, and the diameter of the view was maximum.

During the day of the rush, the black Saturn rose from the East Horizon. It was located in the south at midnight. The height reached the highest height. When the sunrise in the morning, it fell from the western horizon. At this time, Saturn appeared in the sky all night. The best time.

Saturn is located in the Baotang seat. It is the most beautiful celestial body in the telescope because it has a beautiful halo. You can see Saturn halo with about 30 times the astronomical telescope. If the telescope multiple reaches more than 100 times, you can see the Saturn halo very clearly, and you can even see the gap of the halo.

On August 19th, Mars and Xingxing Group accompanied the month

On the August 19th evening, Mars will occur. At that time, the moon and Mars will be located in Taurus. Not far below the Star Troupe, the sky -like landscape of Mars and Star Group will form. The Xingxing Tuan is a bright evacuation star group. Under the ideal conditions, six or seven little stars can be seen together with the naked eye. It is the traditional 28 -suction in my country, so it is named the Xingxing Tuan, commonly known as the "Seven Sisters Star Group". On August 19, the moon and Mars will rise from the horizon north of the east at about 23 o'clock in the midnight. The brightness is 0, etc., the Xingxing group is above the moon, more than 4 degrees from the moon. These three different types of celestial bodies are gathered in the range of about four or five degrees north of the east. It is rare and it is worth observing and shooting.

On August 28th, Mercury East Big distance

Mercury is the closest planet to the sun, and it is also the most difficult planet to observe among the five major planets. Because it seems on the earth, most of the year has been annihilated in the light of the sun, and it cannot be seen. Only when it is the farthest from the sun, or from the perspective of the sun to the maximum Opportunity is barely observed. Because Mercury and Venus are running within the orbit of the earth, they always look back and forth near the sun, and will not exceed one specific angle. For Mercury, this angle will not exceed 28 degrees. The maximum angle to the east of the sun is the east, and Mercury will appear on the western horizon at dusk.

Mercury takes 88 days a week around the sun, so it will appear 3-4 times a year when the Middle East and the Western University distance will appear 3-4 times. This year Mercury will have 4 Dongda distance and 3 west distances. This time, Dongda distance is the third time this year. Each time the east is from the sunset, Mercury's horizon is different, and the observation conditions are different. Sometimes because the height is too low, it is not suitable for observation.

On August 28th, Mercury East Big distance was the worst to observe Mercury's conditions this year. For Beijing, Mercury's horizon was only more than 9 degrees during sunset. Mercury's horizon is only a few degrees, and it will soon fall to the horizon, and observation is very difficult. Of course, the time to observe Mercury east is not limited to the day of August 28. From the first 20 days of the east, as long as the weather is good, you can start observation. The observation time can start 15 minutes after the sun falls. At this time, it is not completely dark. It is difficult to see the stars in the naked eye. It is best to use a small binocular telescope to assist the observation. (The author is a senior engineer of Beijing Astronomical Museum)

(Source: Technology Daily Xinhua News Agency client)

【Edit: Fu Sakura】

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