How to create a connective-space-suspension-bridge:

First you have to create bases around the world, building up a level of platforms with connective tube fittings', to be able to create a suspebsion space bridge  to another possible planet, you have to be able to re-align the levels' with spaces of vaccums between each platform to secure the levels from breaching  gravity or gravitational force, it is possible to create enviromental platforms  around the world, to meet atmospheric pressures', that would then go onto create a upper base for a connective space bridge.

How to create a connective space bridge, it would be a project of connective reinforced space optic materials', that would slot together in rounding rings of rubic cube lockings' to create a bridge that would have shut down points' and vaccums' with mini space outletts that stem downwards' to connect and reinforce   bends and or weakpoints' in the design, once across you would then be looking at claw points of rope extended power points to grip to surface points  of hard mountain positions'.

To get back you would send a small flight craft  down the locking system with an altimated programmed position.