If a Jupiter-sized sphere of a translucent liquid were to suddenly appear, what would the inner core consist of? Would the planet refract light? Assuming Jupiter is suddenly replaced, or if a giant sphere of fruit juice or other translucent mixtures/liquids were to appear bearing a similar radius to that of Jupiter, hypothetically , what would be the contents of the inner core? Would the pressure there be so high as to rip the liquids into their constituent atoms? Would light from a Sun shining on this planet be refracted through the planet's translucent body?
A Jupiter made of fruit juice would probably allow sunlight to enter the first few metres below its surface, before being absorbed.  Just think how far light penetrates the water of the ocean. So you wouldn't be able to see the sun through it. It wouldn't act like a lens.
If you magically created it with uniform density, it would be very very far out of equilibium. The central parts would compress and release huge amounts of gravitational energy in the process.  The effect would probably be dramatic.
If you created it with a density and temperature gradient to keep it stable, you'd probably get a mantle of ice and water (including exotic high pressure ices) Depending on your exact temperature profile the water would be supercritical (it is indistinguishable from very high pressure steam, and there is no boiling point). The centre might be supported, at least in part, by electron degeneracy.
And (again depending on the exact parameter you choose) there could be a water vapour atmosphere.
As Rob says in a comment, &quot;I doubt whether anybody has spent their time working out what happens to a Jupiter-mass of fruit juice.&quot; But we can look at a slightly smaller planet made out of ammonia and water: Neptune and Uranus are mostly water and ammonia ices, under a thick a hydrogen/helium atmosphere.