without any real knowledge of earth 's existence , and without the ability to see where they going inside side space , for all he knew they would find a field of planetary debris in the place where the world of his ancestors once resided - and that said a lot , as earth 's orbit around sol was 94 million kilometers - a huge distance to cover on fusion-ion propulsion , with so little time to capture the fugitive , even if he was anywhere in the vicinity of sol .