The light curve of a supernova is affected by time dilation due to the expansion of the universe, which must be corrected to determine the supernova's distance.

“it is a supernova whose light curve does not fit the light curve of other supernova that it's supposed to until you invoke the expanding universe time dilation on its light curve. There you go. Then when you mathematically remove the time dilation of the light curve, it falls right back on on Q.”