> Even the most optimistic generation ships would be taking 10s of thousands of years to get there https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propuls

> Even the most optimistic generation ships would be taking 10s of thousands of years to get there https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion) https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propuls... Nuclear bombs make for pretty good propulsion systems and can propel incredible mass at a decent speed. In a "the planet needs evacuation" type of scenario you don't worry about the fallout either.