How often does nine planets Gobang appear?

The short time is 130 years, and the long time is 180 years.

Nine-star conjunctions are extremely rare natural phenomena. It means that when the nine planets are all in a straight line on the same side of the sun, it is called nine-star alignment.

However, there are few opportunities for real alignment, and it is more appropriate to call it "the convergence of the nine planets". The quasi-period of "convergence of the nine planets" in the geocentric coordinate system is about 100 years (short 130 years, long 180 years).

Extended data:

history

From 300 BC1year to 3000 AD, there were 49 six-star conjunctions with θ below 5 degrees, 3 seven-star conjunctions and 8-star conjunctions above 5 degrees. If the θ angle is expanded to 10 degree, there are 709 six-star renju, 52 seven-star renju and 3 eight-star renju.

In order to identify the nine planets arrangement, it is necessary to expand the θ angle to 15 degrees. Even so, the nine-star renju only happened once in 6000 years, that is, it happened on1149 65438+February 6. This shows how rare the phenomenon of nine-star alignment is, and it is not a real nine-star alignment, because it is almost impossible to happen, or it will take tens of thousands of years to happen.

Therefore, more strictly speaking, it is not a nine-star alignment, but a "convergence of nine planets", which is not in a straight line. And the next nine-star renju phenomenon will happen in 2049, when we can still see the nine-star renju alive. And some people will ask, will there be any special events on earth?

In fact, it will affect not only the earth, but also other planets, asteroids and comets. Of course, the gravitational force from the planet will act on all kinds of celestial bodies, and no matter how the planets are arranged, it will not bring any perceptible changes.

Since ancient times, people have been in awe of the stars in the sky. The nine-star alignment is considered as a sign of disaster and the end of the world, but in fact it is just superstition.

Baidu Encyclopedia-nine planets Gobang