[nomel]

> It's expected never to encounter any other object in all eternity.

This is read as "near zero" rather than "no chance". "Expected" is a word of uncertainty.

I think the rough napkin math would be: take the volume that the probe will sweep through and multiply it by the volume of matter in the universe/volume of the universe.

[antod]

So a virtual impossiblity? That's a finite improbability rather than an infinite improbability. I think I need a fresh cup of really hot tea.