How to explain the phenomenon that the sun and the moon shine together?
Sunrise is a natural phenomenon, which is caused by the different rotation periods of the earth around the sun and the moon around the earth.
The phenomenon that the sun and the moon shine together requires the sun and the moon to be above the horizon at the same time. Theoretically, as long as the atmospheric conditions are good, this phenomenon may occur except the fifteenth day of the lunar calendar.
But there is a second condition, that is, the limit magnitude of the sky (the darkest celestial body that can be seen) cannot be too low, so generally speaking, when the sun rises or is about to set, the brightness of the sky can easily meet this condition (even in cities).
So in the first half of the lunar calendar (after the fourth day of the lunar calendar), you can see the moon phase when the sun goes down, from west to east in turn. In the second half of the lunar calendar (before the 27th), you can also see the moon after the sun rises, from the western sky to the eastern sky.
The legend of the sun and the moon shining together:
Legend has it that after the death of the sun god, his sons were very wild and showed off their light and heat, so they were shot dead by Hou Yi for nine suns. Hou Yi did not shoot the youngest son of the sun god to stab the sun, because he felt the kindness, kindness and purity of the house that stabbed the sun.
Later, the thorn sun met the daughter of the moon god-the dark moon. Although the posture of Dark Moon is delicate, her eyes are unusually cold. Strangely, the thorn sun suddenly felt pity and love for the dark moon. He vowed that even if he kept the last light and heat, he would continue his predestined love with his previous life. Finally, this sincerity and persistence touched Dark Moon, her eyes were no longer cold, and they lived happily together.
What is even more touching is that in the days to come, the thorn sun and the dark moon always appear irregularly in the sky at the same time, so as to persuade people who love each other to cherish each other and protect happiness. Later, there was a saying that lovers who saw the sun and the moon shine together would be together for life.