• tsegi515

The winter solstice, our shortest day and longest night of the year, arrived Monday

December 21, 2020 is the winter solstice. On this day, Jupiter and Saturn, the largest planets in the solar system, coming closer and both planets appeared like double planets. It happens every twenty years, but overlap at a significant frequently of 397 years. The phenomenon seen from around the world. It happened between 5pm and 6pm after sunset in Ulaanbaatar time. Jupiter is 300 times larger and 318 times heavier than Earth.


The last time this was happened in March 4, 1226, which was 794 years ago. Mongolian history records that during that time, Chinggis Khaan conquered the Khorezm and came back to Mongolia, after one year Mongol army invaded the Tang Dynasty. After 16-year conquests of Genghis Khan resulted in th