Candidate protoplanet spotted inside its stellar womb

Wes, Thanks for the terrific comment! I learned a lot. The area of Fluid Dynamics is rich in phenomena.

Liquid Dynamics in Planetary Formation.

The accretion process works on all planets. The unasked question is, what is the largest thing ever accreted, absorbed by, or impacted on a gas giant planet in our solar system? Has Jupiter absorbed planets larger than earth? What are the dynamics of such an event? What is the result?
I believe that during such an event, the massive planets would follow common physical laws of liquid dynamics creating a massive splash/crater, and a Worthington Jet to scale. A Worthington Jet of that scale could leave a droplet of molten material (a moon) in orbit. The super gravity of gas giant planets makes them more reflexive as it acts to increase the surface tension, just like tightening a drum. We can look to craters, such as Theophilus, on our own moon, to see a common example of a central peak left behind by Worthington Jet forces working on solid rock. Crate chains are also clear indications of such liquid dynamic forces at play.
Being deposited in orbit in that way, the molten material would be able to differentiate it's core, from it's crust. The core of molten metal would be drawn slightly toward the planet it now orbited. This off center core would act like a ballast keeping the moon from ever being able to rotate that bottom side away form the parent planet.
If we look at water splashes here on earth, we can see that sometimes the Worthington Jet results in multiple droplets as the surface tension of the material seeks least resistance. I believe multiple moons may be created from a single impact and jet. These moons would be siblings. Later, that gas giant might absorb another planet, and get more moons. Those moons might share characteristics of the planet absorbed. This might explain the wide differences between the elemental components of moons that orbit the same planet in a way that the current theory, (that these moons are accreted from the same rings of dust, stone, and ices) does not..
As a Worthington Jet collapses back toward the larger planet, a secondary splash may also propel smaller droplets into possible orbital trajectories.
If Jupiter's moons, Io, Europa, and Ganymede, were created from the same Worthington jet, the tidal pull of the surface rushing by underneath them would impart a greater and greater orbital rotation in ration to their mass, and distance from Jupiter. The result of this would be a faster orbit for moons that are closer to the the parent planet they orbit.
Could the rocky inner planets be escaped moons of gas giants? If a moon escaped orbit with Jupiter, or any other gas giant planet, it should have a much more elliptical, comet like, orbit. So here is an event function. When a sun ignites, it creates a powerful solar wind. This wind would act like a retro rocket on in bound objects, and might be just enough to arrest a few lucky rocky bodies into a long term orbit.
If the Earth moon had been spinning much as Pluto and it's moon do, what would the resulting resistance have been on the two inbound masses, and how would it have affected the orbital relationship between them?
It may well have been the coming together of two like sized planets, that made first contact at north and south poles, that resulted in the planet Uranus with it's axis of spin almost perpendicular to that of the sun. The masses of the two large planets spinning around each other as they merged. Saturn also fits well within this model. Would there also be vertical ejecta resulting from a gas giant falling into the Sun?



As a molten moon boils off it's volatile elements, it would seed an icy ring around its new parent planet. These volatile elements could then be reabsorbed by other moons that had cooled down, that also orbit that same parent planet. As the volatile boiling off phase takes place, the tidal forces exerted by the parent planet would cause the convection to orient toward that parent planet as the escaping gases seek the path of least resistance. This would cause the slag, like that in glass or metal refineries, to float away form the parent planet and gather on the far side of that moon. This would also help to off set the metal core, increasing it's likelihood of acting as a ballast. As our moon has suffered some massive impacts that have caused molten lakes that are now Mare, the propagating waves created by those impacts could have traveled all the way to the back of the moon where they “jacked up” or the wave force becomes amplified as it comes together in a smaller surface area.

I would expect that there is more than one way to make a moon. Some moons may be captured from interplanetary space. This would explain moons that have not gone through the core crust separation function. Yet still, other moons may be the result of impacts between asteroids and moons, which may also result in a Worthington Jet being propelled off of that moon's surface.