Is it possible to create a cycler that can travel from Venus to Mars, then back to Venus? Using as little delta-V as possible.
To expound a bit further, it would need to travel from Venus to Mars with a 1,000,000kg(1000 tonne) payload, but travel from Mars back to Venus would not have any payload at all.
Would light-sails be a practical propulsion method? And is it possible, with near-term technology(super-heavy-lift rockets, more efficient solar panels, ion engines, etc...) to build a fleet of them(like 12 of them), constantly moving between Venus and Mars.