On the other hand, Maxwell probably didn't anticipate all the applications of his equations, so perhaps some practical application may be found someday. One effect that does work in real life and has been exploited is to dive down into some gravitational field and fire the engines, leaving the fuel mass deep in the gravitational field and thus increasing the boost by the gravitational potential energy of the fuel. If you found a rotating black hole you could also tap into the hole's spin energy. No, otherwise the Sun would also be blue. The blue color comes from scattering of light off gas molecules in the sky.
Blue light is scattered much more than red light.
We see the sky lit up by the blue light scattered toward us from all over. At sunset the sky is red because the blue light is strongly scattered out of our line of sight to the Sun due to the thick layer of atmosphere that the light must traverse near the horizon. The media constantly portray gravity and weightlessness incorrectly. Well, they are tricky concepts to understand, and most people have no personal experience with weightlessness, and know only that things fall down. People making movies often care less about whether something is correct than whether the audience will like it or accept it.