Probably a lot less time than that if we decided that is what we wanted to do. https://www.open.edu/openlearn/science-maths-technology/science/physics-and-astr

Probably a lot less time than that if we decided that is what we wanted to do. https://www.open.edu/openlearn/science-maths-technology/science/physics-and-astronomy/how-long-would-it-take-colonise-the-galaxy https://www.open.edu/openlearn/science-maths-technology/scie...