Why is the weather in the equator hot all year round?

The English name of the word "Equator" comes from Latin, which means "equal sharing". This is the function of the equator. It divides the earth into the northern hemisphere and the southern hemisphere. It is an imaginary line between the north and south poles on the earth.

Some imaginary lines around the earth parallel to the equator are called "parallels". The equator is zero latitude, and the latitudes above and below it are used to measure the latitudes of various points on the earth's surface. These latitudes are used to divide the earth into several zones, starting from the north, followed by Arctic Circle, North Temperate Zone, Tropical Zone, South Temperate Zone and Antarctic Circle. The tropics are the equatorial belt, including the area from 23 degrees north latitude to 23 degrees south latitude. In this area, the sun shines vertically, so the weather is always hot.

Why is this happening? As we all know, the earth's axis is oblique to its orbit around the sun. So the equator is also inclined to this orbit, and this oblique angle is exactly 23 degrees. Therefore, when the earth moves around the sun, the direct light from the sun sometimes falls north of the equator and sometimes falls south of it. However, the direct light of the sun will not cross the 23 degrees on both sides of the equator.

This shows that the equatorial belt is the only place on the earth where the sun shines vertically. Because the equator has direct sunlight all year round, the weather there is always very hot.