Hi there! I'm new here, and I was looking for some information in the Q&A section of this forum but nothing has helped me so far.
I'm working on a Worldbuilding project, where I'm creating a fictional universe, but I do wish the worlds that I create to to be subject to the laws of physics, like other worlds in our real universe.
So, what I was thinking is, could there be a planet, let's say, a gas giant, but with a solid core made of rock and water? Yes, liquid water?
What conditions does such a thing demand?
And what role does the size of the planet play in the formation of a liquid water, in correlation with the distance from it's star?
If it's possible, this is the second part of the question:
This planet that I'm talking about, is in the 4th orbit around this star, making it the last one in a row. How distant should this planet be in order for this liquid water to be maintained, and not freeze over?
Can the necessary heat (which already comes from the star), be achieved with the heat "aid" of 3 hot molten lava moons revolving in close proximity to the gas giant?
Any answers that remotely satisfy the information I need for these questions would be very appreciated. Thank you.
PS: If I get my answers, I may post some other questions regarding the planet.