Martin Schweiger's Orbiter Space Flight Simulator
"Go Play In Space" (Second Edition) by Bruce Irving.
Fun with Martin Schweiger's Orbiter Space Flight Simulator. This Introductory Tutorial manual is a colorful picture book about humans going to Mars, how they might realistically go about this, and where this might lead in the future.
Download Go Play in space here
Contents
Downloads - Go Play In Space v2 by Bruce Irving