Nitrogen in the solar system

> Ammonia from comets, then small icey moons, then large icey moons,
> then Venus which has 4 times the N2 in its atmosphere then Earth,
> and finally the ice giants Neptune and Uranus.
> Brooks

In a post in March, I estimated the nitrogen in the Kuiper Belt at
2.27e22 kg. This would be easier to obtain than harvesting it from
Uranus or Neptune, and as I recall is more than on all the moons in
the Solar System.