Does Hubbles Law not imply that the universe is expanding exponentially?

Question

anonymous · Answer

v = Hx

$$\frac{dx}{dt} = Hx$$

experimentx · Answer

that's would result in exponentially increasing solution

anonymous · Answer

yes, which is my problem, as the expansion of the universe is meant to be slowing

anonymous · Answer

oooh i get it

anonymous · Answer

hang on ill say in just a sec

anonymous · Answer

The expansion of the universe is in fact accelerating.

experimentx · Answer

I think i read or misread that universe is expanding in rapidly rather than constantly ... not sure if it's exponential or some quadratic factor

experimentx · Answer

or some polynomial ...

anonymous · Answer

no its fine, see the apparent velocity of recession is not its current velocity

anonymous · Answer

longer time ago = faster expansion

anonymous · Answer

greater distance of galaxy => the light we see is older

anonymous · Answer

so exponential is true, but it's not the case that expansion is exponential, just that galaxies further away we see how they were millions of years ago etc

experimentx · Answer

it seems it's expanding exponentially v=Hd http://en.wikipedia.org/wiki/Hubble's_law "Astrophysicists are always wrong, but never in doubt. ... RP Kirshner"

experimentx · Answer

gotta sleep .. good night!!

anonymous · Answer

Lawrence Krauss has a good explanation of this. You should look him up.