Fig. 6. Deviations in the Hubble diagram. Each point in this plot shows
the difference at each redshift between the measured apparent brightness
and the expected location in the Hubble diagram in a universe that is
expanding without any acceleration or deceleration. The blue points
correspond to median values in eight redshift bins. The upward bulge
at z {approx} 0.5 is the signature of cosmic acceleration. The hint of
a turnover in the data at the highest redshifts, near z = 1, suggests
that we may be seeing past the era of acceleration driven by dark energy
back to the era of deceleration dominated by dark matter. From top to
bottom, the plotted lines correspond to the favored solution, with 30%
dark matter and 70% dark energy, the observed amount of dark matter (30%)
but no dark energy, and a universe with 100% dark matter (from ref. 18).