The critical evidence for cosmic acceleration in 1998 came from two teams of astronomers,both observing:
A) hypernovae.
B) gamma ray bursts.
C) type I supernovae.
D) type II supernovae.
E) ages of globular clusters.

Question

Quizplus · Accepted Answer

The critical evidence for cosmic acceleration in 1998 came from two teams of astronomers observing distant type I supernovae. They discovered that these supernovae appeared to be fainter than expected, indicating that they were farther away than previously believed. This suggested that the expansion rate of the universe was accelerating, rather than slowing down as expected.

The Critical Evidence for Cosmic Acceleration in 1998 Came from Two