3. Core: Center of Sun, hottest part. Nuclear fusion takes place
Convection Zone: Full of hot gases. Energy released
Photosphere: Source of sunlight. Visible part of Sun
Prominences: Flame-like gases that travel outward
Sunspots: Darker, cooler areas of Sun
Solar Flares: Streams of charges atoms
Corona: Outer atmosphere
Chromosphere: Gases above the photosphere. Seen only during an eclipse

4. Basic Sun Facts
The Sun is 93 million miles away from Earth. (It takes sunlight 8.5 minutes to reach Earth.)
Surface Temperature: 10,000 degrees (F)
Core Temp: 22,000,000 degrees
Corona Temp: 2,000,000 degrees
HOT STUFF!!!

5. How Does Fusion Work? Nuclear fusion:
a process by which two light nuclei combine to form a single larger nucleus.
However: nuclei are positively charged
Like charges repel
Two nuclei naturally repel each other and thus cannot fuse spontaneously
For fusion, electrical repulsion must be “overcome”
When two nuclei are very close the strong nuclear force takes over and holds them together.
How do two nuclei get close enough?

6. Fusion needs fast moving nuclei
Fast moving nuclei can overcome the repulsion - they get a running start.
Lots of fast moving nuclei means high temperature.
The core of the Sun has a temperature of 15 million degrees Kelvin. (ouch!)
Low speed
High speed

7. Temperature and Pressure
temperature: random motion of atoms in a gas
pressure: amount of force per unit area on piston from gas
generally pressure increases with increasing temperature

8. This is a little more to scale!!!
Sun
Earth

9. EARTH
Only receives 2 billionths of the sun energy that is produced by Nuclear Fusion.

10. The Earth is tilted on it’s axis 23.5 degrees.
This is why we have seasons.

11. The End for now :0)