What discoveries did man make by observing the sun?

In the course of many years of studying the Sun, astronomers have made the following discoveries:

1. The gravity of the solar surface exceeds the gravity of the earth by 28 times. This means that an object weighing 60 kg on the Sun will weigh as much as 1680 kg.

2. The sun occupies about 99.86% of the size of our solar system.

3. The temperature on the surface of the star is 5500 degrees Celsius, and the temperature of its core is 13.599.726 degrees!

4. If a drop of the substance that makes up the Sun fell to the ground, then all living things would perish within a radius of 150 kilometers.

5. The volume of the Sun’s energy reaching the surface of the Earth is 6000 times greater than the volume of energy used by all mankind.