Ten Interesting Facts . . . . Earth’s Sun

Ten Interesting Facts . . . . Earth’s Sun

Sun Photo

1. Description

Our sun is 4.59 billion years old. It is a Yellow Dwarf with a diameter of 1,392,684 kilometers. The surface temperature is 10,000 degrees Fahrenheit (5500 degrees Celsius), and its core is around 27 million degrees Fahrenheit (13,600,000 degrees Celsius).

2. Size

The sun is 960,000 times bigger than Earth. It makes up around 99.86% of the Solar System’s mass. Jupiter takes up most of the final mass. If you flatten out Earth, it would take 11,990 of them to cover the surface of the Sun.



  Diameter Ratio of the Sun
Compared to . . .
Sun 1377648 km
Mercury 4880 km 1 to 277.
Venus 12104 km 1 to 113.
Earth 12756 km 1 to 108.
Moon 3476 km 1 to 416.
Mars 6788 km 1 to 208.
Jupiter 142740 km 1 to 9.68
Saturn 120034 km 1 to 11.4
Uranus 51152 km 1 to 26.8
Neptune 49620 km 1 to 27.7
Pluto 2296 km 1 to 625

3. Growing

The sun is slowly becoming brighter. In about a billion years from now, the Sun will grow so hot that life on Earth will be destroyed. Liquid water will dry up. In another 7 billion years, the Sun will reach the giant phase and will expand to engulf Earth.

4. Changing

After expanding, the sun will collapse to be approximately the size of Earth. When this happens, it will be called a dwarf white. About 74% of the Sun is hydrogen. It has already burned off about half of its stored hydrogen.

5. Shape

The sun is almost a perfect sphere.

6.  Light

Light travels at the rate of 300,000 kilometer per second. Because of this, light from the Sun takes 8 minutes and 20 seconds to reach Earth.


Just as the Earth orbits the sun, the sun orbits the center of the Milky Way. This takes 225-250 million years to complete.


Because the sun is a sphere of hydrogen gas, different parts rotate at different speeds. The area near the equator takes about 25 days to complete one rotation, and the areas near the poles take around 36 days.

9. Magnetic Polarity

Every 11 years, the sun reverses its magnetic polarity. The north magnetic pole becomes the south pole and the south pole becomes the north pole.

10. Gravity

Gravity is so strong on the sun that a person weighing 150 pounds on Earth would weigh more than 4,000 pounds on the Sun.


  The weight of a
150 pound person on . . .
Sun 4060.8
Mercury 56.7
Venus 136
Earth 150
Moon 24.9
Mars 56.5
Jupiter 354.6
Saturn 159.6
Uranus 133.3
Neptune 168.7
Pluto 10


Information Sources






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Gay Miller


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