Observations of Type I supernovae in distant galaxies have shown that
A) the star formation rate in galaxies decreases with increasing redshift.
B) the expansion rate of the universe is increasing.
C) the cosmological constant is zero.
D) dark energy is negligible at the present time.

Question

Quizplus · Accepted Answer

Observations of Type I supernovae in distant galaxies have shown that the expansion rate of the universe is increasing, indicating the presence of dark energy. A and C are not relevant to the observations of Type I supernovae, and D contradicts the current understanding of the presence and influence of dark energy.

Observations of Type I Supernovae in Distant Galaxies Have Shown