Hi, There is now a very simple way to calculate Hubble's Constant, by inputting to an equation, the numerical value of Pi and the speed of light (C) from Maxwell's equations and the value of a parsec. NO space probe measurements (with their inevitable small measuring / interpretation errors) are now required. Hubble's Constant is 'fixed' at 70.98047 PRECISELY. This maths method removes the errors / tolerances that is always a part of attempting to measuring something as 'elusive' as Hubble's Constant.
The reciprocal of 70.98047 is 13.778 billion light years. as 70.98047 never changes, 13.778 is the 'Hubble Horizon Distance' only, and NOT the age of the universe.
The equation to perform this can be found in ?