posted on Jul, 4 2008 @ 04:24 AM
Clearly, these moons were not born out of Jupiter, rather, they were pulled into Jupiter's gravity. Did they once have a place in the solar
system as planets? were they rogue planets from outside the solar system?
It is highly probable that Jupiter had a ring of material around it when it was forming, and the Galilean moons (Io, Europa, Ganymede, and Callisto)
were all formed from this ring of material.
The chances of four large objects being captured by Jupiter's gravity in the early days of the Solar System are so vanishingly small that we can
safely disregard it. It is exceptionally difficult for a planet to permanently
capture a solar orbiting object. It would probably require
numerous decelerating encounters in succession to achieve. An extremely unlikely scenario.
There is no chance whatsoever that they are rogue planets from outside the Solar System.
Who knows, maybe one day if Jupiter decides to condense into a small star, then perhaps its moons will be called planets then, maybe even able
to support life.
Jupiter will never
become a small star. It has barely more than 1 per cent of the mass required to compress its core to such an extent that
nuclear fusion reactions begin. Don't listen to any of these wild theories about Jupiter being almost massive enough to ignite as a star. It isn't