OCR GCSE Physics B · J259
Paper 1, Paper 2
Revise: Red-shift and Evidence for the Big BangAstronomers can compare the distances of galaxies with their recession speeds inferred from their spectral shifts. On the large scale, they find a clear pattern: the farther away a galaxy is, the faster it is receding from us. Edwin Hubble announced this relationship in 1929 after comparing observations of galaxies.