Which of the following would be the oldest?
A) a 4000 K white dwarf
B) the Sun
C) the CMB
D) a 20-solar mass main-sequence star
E) a halo star with 1/250 heavy-element abundance relative to the Sun's
Correct Answer:
Verified
Q45: The CMB fluctuations seen in the WMAP
Q46: A galaxy is measured to have a
Q47: The COBE microwave map shown in the
Q48: The cosmic microwave background radiation was emitted
Q49: Redshift z = vr/c, where vr
Q51: The existence of the cosmic background radiation
Q52: The oldest photons we detect in the
Q53: Why is it not possible to
Q54: The temperature of the CMB is hotter
Q55: The current temperature of the cosmic background
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