I'm writing a science fiction story based on:
- turning Jupiter into a star.
- colliding Callisto and/or Io into Ganymede to increase mass and changing the orbit to provide warmth, atmosphere, and rotation.
- using Neo-Ganymede for human habitation and a stepping stone to the stars.
This will require gargantuan energy and a lot of mass - of the right kind.
I realize that the amounts of energy to accomplish this project are unrealistic, but I want an estimation in order to write the story with as few "fiction" theories as possible. thanks