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**Mo**dified

**N**ewtonian

**D**ynamics.

Anyway, it proposes that there is this other new constant [tex]a_{0}[/tex] that is a very very very low acceleration that exists. Basically, as far as I can tell so far the whole idea is that under very very small acceleration F=ma breaks down.

so, a lot of sites reference this value of [tex]a_{0}[/tex] to be 1.2E-10 m/s/s

Now with that background in mind, here's my actual question.

Most of the sites mention that the original author of this concept remarked that if you take the age of the universe and see what speed something would be at after moving with this acceleration, the velocity equals the speed of light.

or in that person's words

"... the acceleration you get by dividing the speed of light by the lifetime of the universe. If you start from zero velocity, with this acceleration you will reach the speed of light roughly in the lifetime of the universe."

My question is

**What value for the age of the universe was this person using?**? I can't seem to find it anywhere, and my calculations using the 13.7 billion year value(yes I converted to seconds first) doesn't come close to the speed of light when I work it out.

Anyone know what I'm talking about?

A brief intro to MOND theory can be found by googling around. Most of the sites say the same thing.

I just wanted to see if this value * age of universe really equalled the speed of light as we know it.

Thanks