The civil engineering "double star with the moon" was staged continuously on the 14th and 15th, and the sky was clear and visible to the naked eye

Tianjin, 13 Oct (Xinhua) -- According to experts on astronomical science, on October 14 and 15, the moon will be relatively close to Saturn and Jupiter. At that time, these three bright celestial bodies will form a "double star with the moon" celestial phenomenon in the night sky, which is very easy to identify and worth observing.

Song Yuanyuan, director of the Tianjin Astronomical Society and an astronomical science expert at the Tianjin Science and Technology Museum, said that "double star with the moon" refers to two planets or stars, which are close to the moon and appear in the night sky at the same time. Sometimes the three form a "triangle", and sometimes they form a huge smiley face in the night sky, and the "eyes" on the smiley face are most commonly jupiter, Venus, and Saturn.

In order of near and far, Jupiter is the fifth planet to orbit the Sun and the largest planet in the Solar System, known in ancient China as the "Year Star", with an average orbit around the Sun for an average of 11.86 years. Observed from Earth, Jupiter is a very bright planet.

In order of near and far, Saturn is the sixth planet orbiting the Sun and the second largest planet in the Solar System, known in ancient China as the "Fill Star" and "ZhenXing", orbiting the Sun for about 29.45 years. With its bright, wide rings, Saturn is known as the most beautiful planet in the solar system.

Song Yuanyuan pointed out that in recent times, these two beautiful planets in the night sky will appear in the southeast sky at sunset in turn, falling at 2 to 3 a.m. the next day, the two angles are very close, jupiter brightness is -2.6 magnitude, Saturn's brightness is 0.5 magnitude, very bright in the clear sky.

On October 14, the "Saturn Conjunction" will occur, and the angle distance between Saturn and the Moon will be very close; on October 15, the "Jupiter Conjunction" will occur, and the angular distance between Jupiter and the Moon will also be very close.

"For two consecutive days, the civil binary star and the moon interact closely and intimately, like a 'starry sky party', which has become a beautiful landscape in the southeast sky." However, this time in our country, we will not see the moon moving to the "middle" state of Saturn and Jupiter, while in North and South America, the moon will move between Saturn and Jupiter, and the "face" of the 'double star with the moon' can be seen. Song Yuanyuan said, "Although the form of this 'double star with the moon' is not very symmetrical in China, it may not be in line with the aesthetics of most people, but it can be seen at sunset, the observation is not difficult, and the naked eye is clearly visible." (End)