Twelve constellations of civil engineering _ Pictures of twelve constellations of civil engineering

Saturn and Jupiter will stage the attraction of stars. Saturn and Jupiter will stage the gravity of stars. What does this mean?

1, Saturn and Jupiter will stage the attraction of stars: 65438+February 2 1 "winter solstice", and there will be a rare "civil harmony" phenomenon in Tianyu. By then, Saturn and Jupiter will almost "merge into one", and a wonderful drama of "stars attract each other" will be staged soon. On average, there is a "civil conjunction" every 19.6 years. The last one happened on May 28, 2000, but because Jupiter and Saturn were too close to the sun, people didn't have a chance to enjoy it.

2. Shi Zhicheng, a member of the Chinese Astronomical Society and director of the Tianjin Astronomical Society, said that the observation conditions of the "Civil-Building Intersection" on February 2 1 65438 were very good, and the interested public in China could observe it for a period of time after sunset. As early as the beginning of this year, silver Jupiter and pale Saturn attracted each other. After nearly a year's "test", they finally came together at the end of the year. "After sunset every day in June and February of 5438, if the weather is fine, it is easy to find them in the southwest sky. During this period, Jupiter is the brightest star in the southwest sky at night with a brightness of -2.0. The slightly darker star next to it is Saturn, with a brightness of 0.6. 65438+February 2 1, the angular distance between Saturn and Jupiter is only 0. 1 degree, which is only one-fifth of the apparent diameter of the full moon (about 0.5 degree), forming a rare "super-close" coincidence phenomenon. The two are close at hand and can be called a "seamless" hug. " "Stars attract each other" is an interesting astronomical phenomenon, which refers to the astronomical phenomenon that the angular distance between two stars is very close and the two stars embrace each other with the naked eye.

3. What does the attraction of a star show? The actual distance is far away, and "combination" is a visual effect. Experts emphasize that what we call the coincidence of Jupiter and Saturn is only a visual effect seen from the earth. In fact, the distance between the two planets is very far. Because they follow their own trajectory, this phenomenon will occur at some point. When Jupiter and Saturn have the same right meridian or yellow meridian, they are also called "Jupiter and Saturn". When this kind of planetary coincidence occurs on celestial bodies, it is often the moment when two celestial bodies look closest in the night sky. The convergence of Jupiter and Saturn is generally called "big gathering". Jupiter has an orbital period of about 1 1.9 years, while Saturn has an orbital period of 29.5 years. Jupiter and Saturn overlap once every 19.6 years on average. It seems that Jupiter is catching up with Saturn. In fact, the real distance between these two celestial bodies is at least 740 million kilometers, and the farthest distance can reach more than 8 100 million kilometers.

4. The attraction of stars means that the public with conditions can observe the surface details of Jupiter, Saturn's rings and several bright satellites in a small field of view. At the secret meeting 800 years ago (1226), their distance was three times that of this time. Close distance like this can be said to be once in a hundred years, so it should be said that it is a rare phenomenon. The next time these two celestial bodies can meet at such a close distance, it will be another 60 years before 2080.