bundeep said...barn said...
Those dates are facts..
Those dates are outcomes of models based on observations, scientific theories and associated assumptions. To say they are 'facts' is a massive stretch of the term 'fact'. A lot of the scientific theories have changed over time, as has our powers of observation (new technology like hubble telescope) and hence its not unlikely that they, and hence the outcomes of the models, will not change in the future. This is more so in regards to the age of the universe.
They are as much facts as gravity and our own existence.. It's stretching the definition of fact according to an anal mathematician, or philosopher... But it's a fact trees are green, birds can fly, and that the universe is 13 billionish years old..
We know it's a fact because of the Radioactive decay of isotopes, just like C-14 but instead of the half life being a few thousand years, the half life of some elements is the age of the universe, twice the age of the universe, a quarter of the age of the universe etc.. These clocks all line up perfectly to tell us the Deep time..
We can count on the physical properties of the elements remaining consistant over the age of the universe, just like we count on Oxygen remaining combustable every time we breath..
Those are the facts.. Trees are green, universe old, birds fly... Not a massive stretch..
doggie said...
Age of the universe = Aprox 13.75 billion years
Age of the Earth =Aprox 4.54 billion years
Stonehenge =Aprox/About 4000 years... . . .
The approximation is implied by the significant figures, I did not write the Age of the universe is 13756385492 years and 16 days... Sig figs give you the accuracy. Stonehenge date is irrelevant when comparing to something billions of years old, might as well have been built yesterday..