Essays on Twenty-four Solar Terms (7) Vernal Equinox: Sunrise in the East
Take a deep breath, calm down and continue to appreciate the color changes of the upper layer of the crown.
The alternation of day and night is quiet without trace. The sky is much brighter, and the blue and white on the horizon slowly turns to lavender, and then to rose.
Before the sun rose, it began to paint in the vast sky.
Looking forward to it, a golden bright spot suddenly appeared on the orange-red horizon-the sun rose!
At that moment, it was like the first cry of a newborn baby, and it was like the moment when a delicate bud loosened the tightly wrapped petals. This is really comforting.
Watching the sunrise, why hasn't it been common? Because this sudden appearance from nothing gives people a feeling that it has always been so fresh and interesting.
However, it will be more fun to watch the sunrise on the vernal equinox.
Do you know that?/You know what? On this day, the sun comes out, except for the North and South poles, the eyes of the whole world watching the sunrise will focus on the point due east.
Yes, impartial, due east.
At this time, facing the sun, raise your right hand horizontally from the right side of your body and point to the south.
Isn't it interesting that you can determine the direction so easily?
However, how did this happen?
This question is also an interesting pursuit.
Our earth, like a tireless dancer, has danced around the sun for billions of years, drawing countless large and smooth ellipses in the vast space. What is even more amazing is its graceful dance with an inclination of 23.26 degrees, pointing in one direction again and again and never giving up.
This oblique dance makes the incident angle of the sun change, and light and heat flow on the ground, so there are four seasons in a year, and spring, summer, autumn and winter bring cold and heat, so there is light with the right temperature everywhere, and we humans and even all life thrive in this suitable environment.
And if you imagine the relative position of the axis and the sun in this rotating dance, you can find the answer to our previous question.
The earth is running. When the axis of rotation points to the sun, the incident direction of sunlight will be from south to north or from north to south. When the sun shines to the north, the winter solstice comes; When the sun shines to the south, the summer solstice comes.
So what is the relationship between the axis of rotation and the sun on the vernal equinox?
At this time, it is parallel to the sun, and in its orbit, it is located in the middle of the summer solstice and the winter solstice, that is, between the south and the north, in the east, perpendicular to the connecting line between the sun and the earth. At this time, the sun will fully illuminate the northern and southern hemispheres, so in the morning, the sun seen all over the world rises from the due east.
On the day of the vernal equinox, the length of day and night is equal, the light adds more heat, and the footsteps of spring are solid and powerful, so they no longer wander. No matter how strong the cold air is, the laws of nature are irresistible.
Looking around, the world is spring.