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Sun takes 99.86% of solar system's mass

1 million Earths fit in sun

Sun almost perfect sphere

Sun travels at 220 km/second

Sun rotates opposite Earth

Sun 93 mil miles from Earth

Sun is 4.5 bil yrs old

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Stream of charged particles;

Charged particles made by corona

Solar wind releases particles,

some particles go to Earth

Particles from sun can disrupt radio, TV, wifi, etc.

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Solar flares= explosion of hydrogen gas from sun's surface

Happens when loops in sunspot regions suddenly connect

Solar flares= NRG heats gas on sun to mil of dgrs Cel; hydrogen gas explodes

Largest solar flare ever recorded had speed of roughly 7.2 mil km per hour. Luckily, the flare was not aimed directly towards Earth.

Solar flares can greatly increase the solar wind from the corona resulting in an increase in the number of particles reaching earths atmosphere

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Corona outer layer of sun

In mid of ttl eclipse see white corona around sun

Corona Latin for crown

Astronomers study how corona changes

Corona gives off solar wind

Solar wind becomes northern & southern lights

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Chromo Greek for color

During bgng & end ttl eclipse gives reddish glow

Chromosphere middle layer of sun

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Photosphere = Inner layer of sun's atmosphere

Greek word for photo is light, so photosphere means sphere that makes light

During a total solar eclipse moon blocks light from photosphere

When you look at sun you see photosphere

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Sunspots= Dark area of gas on sun

Sunspots colder than gasses around them

Sunspots can be larger than Earth

Sunspots are on sun for 10-12 yearsActivity Sun varies over a/b 11-year cycle

At bgng of cycle, not a lot of sunspots

They  increase over several years

Then, decrease over next couple years

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Prominences are coils of gas linking sunspots

When they collide, they explode

The explosions cause solar flares

Solar flares increase the solar wind from the corona

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The core is the center of the sun

Nuclear fusion happens in the core

Hydrogen becomes Helium

The core is the sun’s source of power

The sun is Earth’s source of energy