Ten Interesting Facts . . . . Earth’s Sun
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).
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 . . .
|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|
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.
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.
The sun is almost a perfect sphere.
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.
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 . . .