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Our sun
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Slide 1

Our sun

Our sun

Slide 2

Solar telescope

Solar telescope

Slide 3

Fusion

Fusion

Need very high temperatures

H + H → He + energy

Energy= heat

Light

EM radiation

Slide 4

Compositon of the Sun

Compositon of the Sun

90% H & 10% He

Plasma- gas stripped of electrons

Slide 5

Sun Layers

Sun Layers

Slide 6

core

core

Where Fusion is taking place

15 million ºC

Slide 7

Fusion

Slide 8

Radiative Zone

Radiative Zone

EM radiation is traveling through this zone

2.5 million ºC

Slide 9

Convective zone

Convective zone

Convection currents

Hot gases rise to surface, cooler gases sink= turbulance

Slide 10

Photosphere

Photosphere

Suns surface

Bubbling plasma

Only 6,000 ºC!

Slide 11

chromosphere

chromosphere

Suns atmosphere

20,000 C

Source of flares/prominences

Slide 12

chromosphere

chromosphere

Slide 13

Corona

Corona

Crown

See only during solar eclipses

2 million C

Made of ions

Slide 14

Journey from the center of the sun

Journey from the center of the sun

Slide 15

Sunspots

Sunspots

Cool spots on sun

Caused by twisting of magnetic field?

Slide 16

Oct. 17, 2012

Oct. 17, 2012

Main sequence star

Slide 17

How long is a sunspot cycle?

How long is a sunspot cycle?

Slide 18

11 year sunspot cycle

11 year sunspot cycle

Cycle number

Slide 19

Solar prominences (filaments)

Solar prominences (filaments)

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