Core: Center of Sun, hottest part. Nuclear fusion takes place Convection Zone: Full of hot gases. Energy released Photosphere: Source of sunlight.

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Presentation transcript:

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

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!!!

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?

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

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

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

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

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

The End for now :0)

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