Supernova Hubble Diagram
An accelerating universe ? given a red-shift, SN should be dimmer than anticipated
The 1998 discovery by two independent groups
Supernova Cosmological Project Saul Perlmutter et al.
High-z Supernova Search Team Brian Schmidt et al.
SNe at 0.3 < z < 0.9 were found to be, on the average, 25% less bright !