What implications does the evidence for dark energy have for the fate of the universe?Were the distant supernovae brighter or fainter than expected? Explain why. (Hint: In Figure 22.18 in the textbook, the position of a supernova point on the vertical axis depends on its redshift. Its position on the horizontal axis depends on its brightnesssupernovae seen farther back in time are not as bright as those seen closer in time.)