On Thu, Dec 11, 2014 at 11:03 AM, Ian Kelly <ian.g.ke...@gmail.com> wrote: > > On Thu, Dec 11, 2014 at 3:02 AM, Jean-Michel Pichavant < jeanmic...@sequans.com> wrote: > > I would advise to remove the the mass parameter of your Sphere initialization. It could be inconsistent with the radius. > > To compute the mass you would need the radius and the volumetric mass density. > > You assume a three-dimensional universe. Clearly this is a two-dimensional "ball" with a density equal to pi/2 mass units per area unit.
Er. 2/pi.
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