Multiple Choice
A star with a surface temperature of 5000 K and a luminosity greater than 10⁴ times that of the Sun is a member of which luminosity class? (See Figure 10-10,Comins,Discovering the Essential Universe,6th ed.)
A) II, bright giant
B) V, main sequence
C) III, giant
D) I, supergiant
Correct Answer:
Verified
Correct Answer:
Verified
Q24: Very hot stars have weak hydrogen spectral
Q114: If you look out at the night
Q116: The star Alderamin has an apparent magnitude
Q117: What is a star's luminosity?<br>A) the amount
Q120: A particular star appears brighter seen through
Q121: In 2013,the European Space Agency launched the
Q122: Spectral classification of a star into the
Q123: What will be the intrinsic brightness or
Q185: Suppose the distance between an observer and
Q253: The spectrum of an ordinary main-sequence star