But hey, that doesn’t make interstellar travel impossible for us. Just very difficult. It won’t be like Star Trek where going from one star to another is like taking flight from one city to another.
Yup. Very difficult. I’ve studied this stuff extensively. The arguments against the possibility of FTL are just plain wrong. They talk about paradoxes and such. FTL that causes paradoxes is not possible. FTL that does not cause paradoxes is just fine.
Nothing with mass can move at the speed of light. But space itself can and in fact provably does between some galaxies.
You’re right about the energy requirements. Only possible source to get there is antimatter, which is insanely expensive. But it wasn’t that long ago when getting a plane to go 100 feet was a huge accomplishment.