[Space] [Spaceships] : Mapping Hyperspace onto Truespace . . .

[vicky_molokh]

Originally Posted by downer

I'm not sure I get your meaning (don't really know what an "exit sphere" is), but on a solar system scale 20,000 km is a flyspeck. So no need to worry, unless you have oodles of such objects flying around.

An exit/entry sphere is a sphere with a Truespace diameter that corresponds to the largest dimension of a ship in Hyperspace. This is important because if two ships try to simultaneously (or in quick succession) enter Hyperspace while in each other's spheres, they will suddenly occupy the same volume in Hyperspace, which will result either in a collision or in fusion (or some other nasty reaction, definitely not healthy for the ships/crew).

And as I mentioned before, 20K km is not a flyspeck - it is 1/10,000 of an AU, or roughly 1½ the diameter of Terra. On a busy orbit around a planet, it's quite a volume (things get easier in the Oort, though). And remember, this is if ships can attain 1K mps. If ship engines cannot attain that speed (but the setting demands HS travel to be as fast), then an even more drastic ratio is required.