Astronomy popular science experts introduced that a unique Jupiter conjunction with the moon astronomical phenomena will be staged on September 11. The reason why it is unique is that is about to usher in the Jupiter that converges to the sun and the moon close to the full moon. Both of them have almost reached the extreme value and are extremely bright. This night, Jupiter and the moon that are scrambling to each other will become an unignorable scene in the clear night sky.
Guangdong Province astronomy enthusiast Zhou Zhiwei took Jupiter and its two satellites in Zhuhai on July 20, 2020. (Photo provided by me)
Jupiter is the largest and heaviest planet in the solar system. It also has many satellites and is one of the easiest objects to observe with the naked eye. In the field of view of the small astronomical telescope , Jupiter's stripes, the large red spots and four Galileo satellites are the goals that are deeply loved by astronomical enthusiasts.
On celestial sphere , the planet and the moon are just running to the same longitude, and the angular distance between the two reaches the closest. This celestial phenomenon is called "planetary conjunction with the moon". When the angular distance between the moon and the planet is close to a certain level, the phenomenon of "moon covering the planet" will also occur.
Director of Tianjin Popular Science Writers Association and Member of the Beijing Astronomical Society Liu Dongyu introduced that Jupiter's conjunction with the moon is not uncommon. As long as the moon "chases" Jupiter's conjunction with the moon will be staged once. This day will occur at least once a month, but the observation conditions will vary from one another. The highlight of this Jupiter conjunction is that on the evening of 11, Jupiter and the moon are very bright; the angular distance between the two is very close; at this time, most parts of my country have entered autumn, and when the autumn is clear and the weather is relatively sunny, the weather is relatively high, and it is very likely to be sunny when it is at night. It is also suitable for the public to enjoy outdoor moonlight.
Jupiter conjunction with the moon was taken in Taiyuan, Shanxi on the evening of May 4, 2014. Photo by Xinhua News Agency reporter Zhan Yan
html After dark on the 111th, the bright Jupiter and the full moon will rise and be visible all night. For observers in the northern hemisphere, Jupiter is less than 3 degrees above the upper left of the full moon, which is the size of the apparent diameter of 5-6 full moons. As time goes by, the full moon gradually begins to approach Jupiter. At around 23:00 on the 11th, the distance between Jupiter and the full moon reached the closest, which is the moment of "convergence". At this time, the horizon is high and easy to observe. Interested public can watch the southeast sky around 20:00 on the 11th. Jupiter and the full moon are dependent on each other, the stars and moon compete for brilliance and shine, which is very beautiful.
Liu Dongyu said that taking into account the time of astronomical phenomena and the brightness of the celestial bodies, among the 14 Jupiter conjunctions this year, this time, in addition to watching with the naked eye, the interested public uses telephoto lens or a small astronomical telescope. Watching, you can not only take pictures of the full moon and Jupiter in the same frame, but also take pictures of the colorful stripes on the surface of Jupiter, the large red spots parallel to its equator, and the four Galilean satellites.
Source: Xinhua News Agency
Editor: Su Yaodan
Duty Director: Yuan Yuzi
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