To determine how the expansion rate of the universe has changed over time, astronomers directly measure the __________ for a sample of Type I supernovae in distant galaxies.
A) redshift and luminosity
B) redshift and brightness
C) redshift and distance
D) distance and luminosity
E) distance and brightness

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The Answer of To determine how the expansion rate of the universe has changed over time, astronomers directly measure the __________ for a sample of Type I supernovae in distant galaxies.
A) redshift and luminosity
B) redshift and brightness
C) redshift and distance
D) distance and luminosity
E) distance and brightness

To Determine How the Expansion Rate of the Universe Has