write down short answers to the questions posed at the
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• Write down short answers to the questions posed at the beginning of the lectures
• Write down answers to the Concept and Quiz questions
Study Suggestions
Fig. 6.12
There are two kinds of spectra: continuous and line.Blackbodies have continuous spectra, characteristic of only their temperatures.
Fig. 6.131 nm = 10-9 m, 1 Angstrom = 10-10 m
Red
Blue
Yellow
Blackbodies
Fig. 6.14
Understand this figure!Spectral Formation
Temperatures•Core 15x106 K•Photosphere 5800 K•Corona 106 K
Densities•Surface <0.01 g cm-3
•Core >100 g cm-3
•Mean 1.4 g cm-3
The Structure of the Sun
Fig. 16.10
The Hertzprung-Russell Diagram
Fig. 19.02
How does the heavy element abundance change with time?
The Star-Gas-Star Cycle
•Total mass 7x1011 Msolar•Stellar mass 2x1011 Msolar•Gas mass 5x1010 Msolar•>12 billion years old
Fig. 19.01a
Fig. 19.01b
The Milky Way’s Structure
Fig. 23-02
Eras of the
Universe
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