Astronomical phenomenon, which is the five-star gobang?
In fact, there are two different ways to understand the five-star renju: 1, which is a classic definition, that is, five planets appear on the same side of the sky with a relative opening angle of less than 90 degrees. 2. Planets are arranged in a straight line in space, or their included angle with respect to the sun is less than a certain value. The definition in Baidu Encyclopedia is written like this.
According to the first definition, the probability of occurrence is not too low, for example, it appeared once in the twelfth lunar month last year. In the traditional concept, this is an auspicious sign, and "five stars coming out of the East will benefit China". If it was in feudal times, it would be auspicious.
Five-star renju, also known as "five-star gathering". In ancient times, water, gold, fire, wood and earth appeared on the same side of the sky at the same time. This phenomenon does not happen often, so the ancients once thought it was a good omen. Later generations expanded it to be called "Julian" as long as five planets live in a palace and continue to be connected. In the Qing Dynasty, Qin narrowed the scope and stipulated that when the longitude difference between the five planets was less than 45 degrees, it was called "Julian". Faced with the rare phenomenon that the five planets Jin Mu, water, fire and earth coexist in the night sky, some people call it "five-star arrangement", which is inappropriate. Experts from Guangdong Astronomical Society believe that the traditional "five-star renju" is centered on the earth, and the five planets in Jin Mu are located on the same side of the sun, and their opening angles are less than 60 degrees, which can be observed with naked eyes. The smaller the opening angle of five-star gobang, the rarer it is, and the smaller it is, the better it looks.
Among the five major planets, Venus, Mars and Saturn appear on the western horizon, while Jupiter hangs in the sky at a 30-degree angle with the horizon, and Mercury approaches gradually. The five planets will be arranged in the order of water, gold, fire, wood and earth, and they will be connected in a line from high to low, which was called "five-star renju" in ancient times. Because these five stars are big planets with high brightness, people can see them clearly with the naked eye.
The five planets have their own orbits, so there will be no possibility of collision in the future. Unless the world no longer exists, what will happen then is unknown.
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