re: Are there any even theoretical possibilities that other planets can be made habitable?

Such a dumb thread.

We can’t even get to the moon.

The real questions you should be asking is who’s theory of gravity is correct ( Einstein and the curving of space time; newton and “attraction”) then ask how either one fits in with quantum mechanics.

But if you can’t come to grips with us not landing on the moon first ask yourself how we “lost the technology and haven’t been able to get it back”