This year's Nobel Prize in Physics was awarded for the discovery of cosmic acceleration using supernova explosions. This talk will explain why exploding white dwarfs make good distance indicators, show how cosmic acceleration was detected and confirmed, and suggest ways to make more accurate and precise measurements to constrain the nature of the dark energy by making the supernova observations at infrared wavelengths. At present, all the evidence is consistent with dark energy that has the same properties as the cosmological constant that Einstein invented and discarded 80 years ago, but the numerical value of this vacuum energy is exceedingly small.