Subject: Re: A random trip
I thought he said it was a map of the solar system...

Hmmm, that could be problematic. First, it's three dimensional, so you'd need a three dimensional dart board.
You could flatten it, but most of it would be empty space.

Probably this would be the best bet.
https://xkcd.com/1389/
It includes surfaces of seas, so bring a boat.

Jim