Astronomy Chapter Eleven

19 Questions  I  By Moonshark13
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1.  Since all stars begin their lives with the same basic composition, what characteristic most determines how they will differ?
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2.  What are the standard units for luminosity?
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3.  A star's luminosity is the
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4.  If the distance between us and a star is doubled, with everything else remaining the same,the luminosity
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5.  Which of the following correctly states the luminosity-distance formula?
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6.  Suppose you measure the parallax angle for a particular star to be 0.1 arcsecond. Thedistance to this star is
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7.  The spectral sequence sorts stars according to
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8.  The spectral sequence in order of decreasing temperature is
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9.  Which of the following terms is given to a pair of stars that appear to change positions in the sky, indicating that they are orbiting one another?
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10.  Which of the following best describes the axes of a Hertzsprung-Russell (H-R) diagram?
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11.  On a Hertzsprung-Russell diagram, where would we find stars that are cool and dim?
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12.  On a Hertzsprung-Russell diagram, where would we find stars that are cool and luminous?
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13.  On a Hertzsprung-Russell diagram, where would we find stars that have the largest radii?
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14.  On a Hertzsprung-Russell diagram, where would we find red giant stars?
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15.  On a Hertzsprung-Russell diagram, where would we find white dwarfs?
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16.  Which of the following luminosity classes refers to stars on the main sequence?
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17.  Which of the following is true about low-mass stars compared to high-mass stars?
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18.  Which of the following statements about an open cluster is true?
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19.  Cluster ages can be determined from
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