Question 1

List the three types of binary stars.

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Question 2

Star A has an apparent visual magnitude of +5 and an absolute visual magnitude of -4.   What is the distance to Star A?

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Question 3

Explain the difference between apparent visual brightness and absolute visual brightness.

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Question 4

Determine the mass of a theorized black hole from the following information. The mass of the companion main sequence star is 6 solar masses. The observed period and semi-major axis of the binary system are 3.5 years and 5.5 AUs, respectively.

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Question 5

Star B has an apparent visual magnitude of +5 and is at a distance of 330 pc.   What is the absolute visual magnitude of Star B?

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Question 6

Briefly state or explain the mass-luminosity relation for stars.

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Question 7

Stellar spectra started with the amount of hydrogen found in the star's spectrum and started with the letters A through Q.  What are the current letters used to classify stellar spectra?

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Question 8

In the accompanying figure, which region represents supergiant stars? Note: (C) represents the entire main sequence while (D) and (E) represent only small parts of the main sequence.

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Question 9

Explain why it would be better to obtain stellar parallax for stars if we could observe from the planet Mars instead of the Earth.

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Question 10

A star has a parallax angle of 0.019 seconds of arc.  How far away is this star from Earth?

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Quiz 9: The Family of Stars

List the three types of binary stars.

Star A has an apparent visual magnitude of +5 and an absolute visual magnitude of -4. What is the distance to Star A?

Explain the difference between apparent visual brightness and absolute visual brightness.

Determine the mass of a theorized black hole from the following information. The mass of the companion main sequence star is 6 solar masses. The observed period and semi-major axis of the binary system are 3.5 years and 5.5 AUs, respectively.

Star B has an apparent visual magnitude of +5 and is at a distance of 330 pc. What is the absolute visual magnitude of Star B?

Briefly state or explain the mass-luminosity relation for stars.

Stellar spectra started with the amount of hydrogen found in the star's spectrum and started with the letters A through Q. What are the current letters used to classify stellar spectra?

In the accompanying figure, which region represents supergiant stars? Note: (C) represents the entire main sequence while (D) and (E) represent only small parts of the main sequence.

Explain why it would be better to obtain stellar parallax for stars if we could observe from the planet Mars instead of the Earth.

A star has a parallax angle of 0.019 seconds of arc. How far away is this star from Earth?