Kou Wen, a senior engineer at the Beijing Planetarium, said that the moon, Venus and Jupiter are the three brightest celestial bodies in the night sky. They are constantly moving according to their respective trajectories, and sometimes they are close to each other, thus forming the form of "double stars arching the moon". However, this kind of situation is relatively rare, and it may only appear once a year. Last night (65438+February 1), the "double star arched the moon" was because Venus, Jupiter and the moon were very close, and the angle was very special, which just formed a smiling face-"this is even more rare".