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A perfect sphere

The Sun is an almost perfect sphere. The difference between the diameter at the poles and the equator of the Sun is only 6.21 miles. 1)

Nuclear Fusion

The sun generates energy using nuclear fusion. Inside it, hydrogen atoms are combined to form helium. Our star uses about 620 million tons of hydrogen per second for this purpose. 2)

Halfway through its life

The Sun is halfway through its life. Since it has been shining continuously for more than 4.6 billion years, it has already used up about half of its hydrogen reserves. As a yellow dwarf, it will be able to sustain the fusion of hydrogen into helium for about 5 billion more years. 3)

Orbiting the Milky Way

The Sun orbits the Milky Way at a distance of about 26,000 light-years from its center. It moves in a clockwise direction. It takes the Sun about 225 to 250 million years to complete one lap of the Milky Way. 4)


The sun has an atmosphere. It consists of a temperature minimum layer, chromosphere, transition layer, solar corona, and heliosphere. 5)

sun.txt · Last modified: 2021/08/11 08:05 by aga