Science, Maths & Technology
Unsolved problems in cosmology
...simple timeline of the main stages in the history of the Universe...Unsolved problems in cosmology: 1.1 The expanding Universe - The first piece of evidence for the hot big bang was the discovery in 1927 by Edwin Hubble and (independently) by Georges Lemaître that the further away galaxies are, the faster they appear to be receding from us. The apparent speed of...