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Use the following chart to answer the questions below:
-Which star in Table 9-1 is the closest to Earth? Note that the distance may be calculated if it is not given explicitly.
Q7: An irregular galaxy contains<br>A) mostly lower-main sequence
Q8: Of the stars in the instability strip,the
Q12: The extinction of starlight due to the
Q20: The _ is the component of the
Q22: The hottest stars in the Orion Nebula
Q42: Convection is important in stars because it<br>A)
Q44: A white dwarf is composed of<br>A) hydrogen
Q46: The pressure of a gas depends on
Q49: A telescope whose objective is a lens
Q52: The absolute magnitude of a star is