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Niles
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The scalefactor a(t) has the value a(t=0) = 0.
My teacher said today that a(t_0)=1. Why is it that the scalefactor has the value 1 today, which is the time t_0? Is it a definition?
The same with the densityparameter Omega_0. Why is this also at a fixed value for t_0, which is now?
My teacher said today that a(t_0)=1. Why is it that the scalefactor has the value 1 today, which is the time t_0? Is it a definition?
The same with the densityparameter Omega_0. Why is this also at a fixed value for t_0, which is now?
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