The sun : solar system series

The Sun is the nearest star from the earth.

The Sun is about 150,000,000 kilometers (150 million km) away from the Earth.

The Sun is the source of almost all energy available on the Earth.

After sun, Alpha Centauri, is the nearest star from the earth.

Light year is the distance travelled by light in one year.

The speed of light is about 300,000 km per second.

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