History of the Universe eBook. 398 pages, 300 illustrations only £5.99
Astronomers calculate red or blue shift values by the following formula:
( femitted - fobserver ) / fobserver
Where femitted is the frequency of the emitted radiation
fobserver is the frequency of unshifted radiation seen by the observer
The following table gives the approximate equivalence between Z and the age after the Big Bang. The figures were obtained using Ned Wright's Cosmology Calculator using the values Ho = 71, OmegaM = 0.270, Omegavac = 0.730 assuming a flat universe.
Z |
After Big Bang |
1089 |
380,000 |
28.62 |
108 my |
28 |
112 my |
27 |
118 my |
10 |
482 my |
8.6 |
600 my |
5 |
1.2 gy |
4 |
1.57 gy |
3 |
2.2 gy |
2 |
3.3 gy |
1 |
6 gy |
0.5 |
8.6 gy |
0 |
13.7 gy |
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