WHAT IS A STAR ?

WHAT IS A STAR

• A star is an object that produces its own energy, including heat and light
• Star s that produce the most energy make about ten million times more energy than the sun
• The least productive stars make only one-hundredth as much energy as the sun
• The closets stars to the solar system are found in the alpha Centauri star system

WHAT IS AN ASTRONOMICAL UNIT ?

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• The distance from the center of the earth to the center of sun

WHAT IS FUSION ?

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• Fusion is a little bit of mass is lost when hydrogen particles combine to make helium

WHAT IS THE SUN ?

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• The sun is a star
• The sun is an average-sized star and the largest object in the solar system
• The sun is the hottest in January
• The sun is in the center of the solar system

HOW CAN THE MASS OF THE SUN BE CALCULATED?

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• The suns mass is to be 2 million trillion trillion kilograms
• This is 745 times greater than the mass of all the other objects in the solar system put together

WHAT GASES COMPOSE THE SUN

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• The sun is a huge,glowing sphere of hot gas.
• Most of this gas is hydrogen(about 70%) and helium (about 28%).

WHERE IS MOST OF THE ENERGY THE SUN PRODUCES FORMED

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• The radiation layer,which is next to the core, moves the energy produced in the core in every direction
• It can take millions of years for energy to move out of this layer

WHAT LAYER OF THE SUN IS VISIBLE

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• The first layer is photosphere it is the visible surface of the sun
• The next layer is chromosphere or the inner layer of the sun's atmosphere

WHAT IS THE AURORA BOREALIS?

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• When gases such as oxygen and nitrogen collide with electrically charged particles released from the sun, that enter the earth's atmosphere, cause the light show called the aurora.

WHAT CAUSES THE AURORA BOREALIS?

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• Electrons are caused in the atoms to move to a higher-energy state when charged particles from the sun strike atoms in Earths's atmosphere.
• When the electrons drop back to a lower energy state, they release a light.
• This process creates the aurora, or northern lights.

HOW DOES THE SUN PRODUCE ENERGY?

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• Inside the sun hydrogen particles smash together to make helium.
• When atoms of hydrogen combine to form helium, they release a large quantity of energy.
• We see this energy as light and heat.

WHAT IS EINSTEIN'S EQUATION?

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• Einstein's equation is E=MC2

WHAT DOES EACH LETTER STAND FOR?

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• E = energy
• M = mass
• C = speed of light