Staying grounded in current physics is not a good idea. Humans are primitive and other civilizations capable of traveling the solar system is not.
Its like if you would ask a human 500 years ago how he think aliens would travel. He would say something likely in that age according to his understanding. We are exactly the same.
Its like if you would ask a human 500 years ago how he think aliens would travel. He would say something likely in that age according to his understanding. We are exactly the same.