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The Sun- Chapter 2

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The Sun- Chapter 2 The Sun Facts About Sun Sun s Color The Sun Is Really White Although the sun appears yellow when seen from Earth, it s actually white! – PowerPoint PPT presentation

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Title: The Sun- Chapter 2


1
The Sun- Chapter 2
2
The Sun
3
Facts About Sun
Distance from the Earth Diameter of the Sun 92.957 million miles 864,950 miles
Age Mass 5 Billion Years 1.99 million, trillion, trillion tons
Surface Temperature Core Temperature 10,900 degrees F. 97 Million degrees F.
Composition 90 Hydrogen, most of rest is helium.
4
Suns Color
  • The Sun Is Really White
  • Although the sun appears yellow when seen from
    Earth, its actually white! We see the sunlight
    after it has been filtered through the Earths
    atmosphere. The air scatters that blue component,
    making the sky appear blue and the sunlight
    yellow.

5
Sun/ Earth Comparison
  • You could fit the diameter of 1,000,000 earths
    inside the sun.

6
Suns Layers
7
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8
Layers of the Sun
9
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10
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11
Corona Layer
  • Outermost layer of suns atmosphere
  • Gas particles up to 1,700,000 degrees C.
  • Gas particles spread far apart
  • Barely cause a spacecraft to heat up.

12
Corona and Earth
  • Holes in the corona attribute to the temperature
    on earth.
  • Drop in atmospheric temperature as suns magnetic
    activity is most intense.

13
Chromosphere Layer
14
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15
Chromosphere
16
Photosphere Layer
  • 1). Photosphere 2). Chromosphere 3). Corona

17
Photosphere
18
Chromosphere Layer
  • Corona-top
  • Chromosphere-bottom
  • Chromosphere- Beneath Corona. Middle layer.
  • Several 1,000 km. thick
  • Gases can suddenly flare up and stream as far as
    16,000 km in space.
  • Avg. temp- 27,800 degrees C.

19
Photosphere
  • Innermost layer
  • 550 km. thick
  • Often referred to as surface of sun
  • Temp dont usually exceed 6,000 degrees C.
  • Venus and suns photosphere

20
Core Layer
21
The Core
  • Temperatures begin to rise again in the core.
  • Up to 15,000,000 degrees C.
  • Hydrogen atoms are fused into helium atoms,
    releasing suns energy as heat and light.

22
Active Sun
23
Prominence
  • Violent Storms

24
Prominence- Violent Storm
25
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26
Prominence
  • Violent Storm with loops of gas
  • Twisted loops originate in chromosphere
  • Gases bend backward and shower gases back onto
    sun
  • Storms can grow to size of sun and then disappear
    a few hours later.

27
Solar Flares
  • Another kind of storm with bright bursts of light
    on suns surface.

28
Solar Flares
  • Doesnt last more than an hour.
  • During flare temperature can be twice the
    temperature of the suns surface
  • Huge amounts of energy released into space.

29
Solar Wind
  • The sun flings out solar wind particles in much
    the same manner as a garden sprinkler throws out
    water droplets.

30
Solar Wind
  • Continuous streak of high-energy particles
    released into space in all directions from suns
    corona.
  • Solar flares increase wind speed and strength
  • Increase can interfere with radio signals and
    telephone communications on earth

31
Sunspots
  • Dark areas on suns surface.

32
Sunspots
  • Appear darker because theyre cooler than the
    rest of suns surface.
  • Number appearing is always changing
  • Indication that gases spin or rotate

33
Axis
  • Imaginary vertical line through center of the sun.
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