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QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. Understanding Sunspots

Understanding Sunspots

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Understanding Sunspots. What is a Sunspot?. The Sun’s Visible Surface. The Lower Atmosphere. The Sun in Hydrogen- a. The Upper Atmosphere. A Typical Sunspot in “White Light”. Sunspot Detail. Sunspot Model. Objects that are hotter are brighter. Which bulb is hotter? Which - PowerPoint PPT Presentation

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Page 1: Understanding Sunspots

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Understanding Sunspots

Page 2: Understanding Sunspots

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What is a Sunspot?

Page 3: Understanding Sunspots

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The Sun’s Visible Surface

The Lower Atmosphere

Page 4: Understanding Sunspots

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The Sun in Hydrogen-

The Upper Atmosphere

Page 5: Understanding Sunspots

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A Typical Sunspot in

“White Light”

Page 6: Understanding Sunspots

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Sunspot Detail

Page 7: Understanding Sunspots

Sunspot Model

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Objects that are hotter are brighter. Which bulb is hotter? Whichis hotter, the sun’s surface or a sunspot? How do you know?

Page 8: Understanding Sunspots

So, sunspots are way cool!

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But, what causes sunspots?

Page 9: Understanding Sunspots

Like planet Earth, our Sun has a

strong magnetic field

Page 10: Understanding Sunspots

Magnetic Winding

The sun rotates faster at its equator than at its poles. The sun’sstrong magnetic field gets wound up causing part of the fields to rupture the surface where they cause sunspots.

Page 11: Understanding Sunspots

Magnetic fields make cool zones.

Fast-moving charged particles are deflected by magnetic fields.The magnetic fields of sunspots deflect hotter gases allowingonly cooler gases that experience less of this deflective force.

Page 12: Understanding Sunspots

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The 11-Year Sunspot Cycle

Page 13: Understanding Sunspots

Butterfly Diagram

Page 14: Understanding Sunspots

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Associated with sunspots are flares…

Page 15: Understanding Sunspots

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prominences, and…

Page 16: Understanding Sunspots

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coronal mass ejections!!!

These causethe aurorasthat we seeon Earth.

Page 17: Understanding Sunspots

Why do we have sunspots?

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Why do we have a sunspot cycle?

What does magnetism have to do withSunspots?