What is the design of Ophiuchus, the thirteenth constellation?

Ophiuchus crosses the ecliptic, crosses the celestial equator, and is partially immersed in the Milky Way, which is probably the only one of the 88 constellations in the whole day. However, the most striking thing about Ophiuchus is a star invisible to the naked eye. This star is located in the east of Ophiuchus beta, with an apparent magnitude of only 9.5m It was first discovered by American scientist Barnard in 19 16, and astronomers named it Barnard Star after the discoverer.

Barnard attracts people's attention because it has several unique places. The first one is "near", which is only 5.95 light years away from our solar system and is the second closest star to us. Followed by self-propelled. Generally, the self-walking angle of a star is less than 1 second a year, the self-walking angle of Capricorn is less than 2 seconds a year, and Barnard's self-walking angle is 10.3 seconds a year, which is equivalent to only 180 years, and it can move a distance equivalent to the diameter of a moon in the sky! This is the largest known star. Interestingly, Barnard is now moving towards our solar system. At this rate, it will become the nearest star in thousands of years. The third and most attractive thing about Barnard is that there are probably planets around it!

Ophiuchus is one of the zodiac signs. Seen from the earth, Ophiuchus is located to the south of Wuxian, to the north of Scorpio and Sagittarius and to the west of the Milky Way. Ophiuchus is the only constellation connected with another constellation-Ophiuchus. At the same time, Ophiuchus is the only constellation that crosses the celestial equator, the galactic channel and the ecliptic. Ophiuchus is big and wide, rectangular, and the celestial equator passes through this rectangle diagonally.

As one of the 13 constellations of the zodiac, Ophiuchus, the sun passes through Ophiuchus at about165438+1October 30th every year until it enters Sagittarius at 65438+February17th. Scorpio has no solar terms on the ecliptic, and Ophiuchus has a solar term of heavy snow.