But let us assume for the moment that there are currently unkown principles of physics that would allow Jupiter to ignite as a star. What would it mean for Earth if someone were to go and ignite Jupiter?
Jupiter Star would put out the same energy per unit of mass as the Sun does
The reaction would be equally as stable as that of the sun
The reaction starts up at full power instantaneously
The ignition method itself does not affect Earth, only Jupiter being a star causes noticeable effects.
Wont' happen, but I'm curious anyways.