>Light sailing is the only existing in-space propulsion technology that could allow us to visit other star systems in a human lifespan. as this article shows t

>Light sailing is the only existing in-space propulsion technology that could allow us to visit other star systems in a human lifespan. as this article shows the light sailing requires unobtanium to make the real light sail. Whereis nuclear explosion propulsion - project Orion - can me made with existing materials. Of course bringing into orbit the required several millions tons of cargo to build the ship from, majority of it being the tens of thousands of nukes, seems to be an endeavor behind our current capabilities.