Originally posted by theresult
and if it did happen trust me YOU WOULD KNOW ABOUT IT..
Let alone the BLAST WAVE that would toast planet earth.. some people think Oh look now its a sun.. yea it is and NOW YOUR TOAST
Not going to happen and if it has YOUR DEAD ALREADY
I'm gonna play devils advocate here for a second

(partly because I have always secretly loved this very far fetched idea)
Firstly the 'blast wave' why would there be a massive blast wave? The planet hardly has enough mass to ignite as it is, a blast wave would
indicate that a large amount of the planet was ejected - so if that were the case I think this 'new sun' would of pretty much of blown it's self
out instantly.
Also if there was a blast wave would it necessarily reach us with any force? The sun pops and farts all day long and it is far closer and far more
powerful than this 'Jupiter sun' would ever be... It's something like 4 AU away from us at it's closest (1AU the dist from Earth to the sun) -
and plus the Sun is currently between us and Jupiter, so would that not shield us?
Not ever gonna happen - but it is a very cool topic. I've always liked the idea that Jupiter is a sort of failed star - and had it actually been a
star I think very little of it's energy would reach us, I think it would appear about quarter the size of a full moon or smaller and bright of
course.