1. The Sun By Andrew and Mia
Systems in science
The Sun
By Andrew and Mia

2. One Million Earths could fit inside the sun
If a hollow sun was filled up with sphere earths then around 960,000 would fit inside. On the other hand if these earths were squished inside with no wasted space then 1,300,000 would fit inside. The suns surface is 11,900 times that of earths

3. The sun is almost a perfect sphere
There is only 10 km in it’s polar diameter. The sun is the closest object to a perfect sphere seen in nature

4. The sun has a very strong magnetic field
Solar flares occur when magnetic energy is released by the sun during magnetic storms, which we see as sun spots. In sunspots, the magnetic lines are twisted and they spin, much like a tornado on earth.

5. Light from the sun takes eight minutes to reach earth
With a mean average distance of 150 million km from earth and with light traveling at 300,000 km per second, dividing one by the other gives us an approximate time of 500 seconds or eight minutes and 20 seconds. Although this energy reaches earth in a few minutes, it will already have taken millions of years to travel from the sun’s core to its surface.

6. The sun will one day be about the size of earth
After its red giant phase, the sun will collapse, retaining it’s enormous mass, but containing the approximate volume of our planet. When this happens, it will be called a white dwarf.

7. The sun travels at 220 kilometers per second
The sun is 24,000–26,000 light years from the galactic center and it takes 225 – 250 million years to complete an orbit around the center of the Milky Way.

8. The distance from the sun to earth changes through out year
Because the earth travels on an elliptical orbit around the sun, the distance between the two bodies varies from 147 to 152 million kilometers. The distance between the earth and the sun is called an Astronomical unit (AU)

9. Other Sun Facts Age: 4.6 billion years Type: yellow dwarf (G’2V)
Diameter: 1,392,684 km
Circumference at Equator: 4,370,005.6 km
Mass: 1,989,100,000,000,000,000,000 billion kg (333,060 x earth)
Surface temperature:5,500 degrees Celsius
Core temperature: 15 million degrees Celsius
Distance from earth: 150 million km

10. Size of the sun compared to some planets

11. Different suns

12. Different sizes of the sun

14. What do the sun do for us?
The sun does a lot of things like give us warmth, vitamin D and heat. We need all of those things to survive and to be healthy.

15. What would happen if the sun disappeared?
If the sun disappeared there would be no light or warmth.
Plants need the sun to grow because they need the warmth to grow and we need plants like fruits and vegetables for food.
The sun gives us vitamin D which our body needs to keep healthy.
We need the warmth of the sun because if there is no heat then everything would freeze and earth would be an ice land. We need the light because then everything would be dark so we wont be able to see anything.