To determine how the expansion rate of the universe has changed over time,astronomers must measure __________ for a sample of Type I supernovae in distant galaxies.
A) redshift and luminosity
B) redshift and brightness
C) distance and luminosity
D) distance and brightness
Correct Answer:
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Q10: In the superstring theory that successfully unites
Q20: If Q21: In order to produce an electron and Q22: What can simultaneously solve both the flatness Q23: Why is the fact that the cosmic Q25: The universe can be infinite in size Q26: In the 1990s,astronomers found that distant Type Q27: The flatness problem arises because only a Q28: Inflation happened Q29: In a closed (spherical)universe,the sum of the
A) when the universe was
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