Has the time dilation of distant source light curves predicted by the Big Bang been observed?
This time dilation is a consequence of the standard interpretation of the redshift: a supernova that takes 20 days to decay will appear to take 40 days to decay when observed at redshift z=1. The time dilation has been observed, with 5 different published measurements of this effect in supernova light curves. These papers are: • Leibundgut etal, 1996, ApJL, 466, L21-L24 • Goldhaber etal, in Thermonuclear Supernovae (NATO ASI), eds. R. Canal, P. Ruiz-LaPuente, and J. Isern. • Riess etal, 1997, AJ, 114, 722. • Perlmutter etal, 1998, Nature, 391, 51. • Goldhaber etal, ApJ in press. These observations contradict tired light models of the redshift. Back to top. Are galaxies really moving away from us or is space just expanding? This depends on how you measure things, or your choice of coordinates. In one view, the spatial positions of galaxies are changing, and this causes the redshift. In another view, the galaxies are at fixed coordinates, but the distance between fixed points increases w
