What are the cores of Uranus & Neptune predominately made of?

Answer 1

Neptune and Uranus are made mostly of hydrogen, oxygen, nitrogen, and carbon, same as the comets... only in a way bigger clump that's still warm enough to keep them as gasses.

So the outer clouds are mostly hydrogen. Then methane, then water vapor, then we can't see, but we think below that there's water, and probably some methane hydrate ices, and ice, and a bunch of carbon compounds, and at the very bottom, there's probably a "rocky core" of some solid material, which is probably mostly made of carbon compressed down very tightly, maybe into crystals. Somebody did a research paper on it, and titled it "Lucy in the Sky with Diamonds," in the 60s.

Answer 2

Some theorists conceive of a core for the gas giants as that of a carbon compressed into a crystalline state by high temperatures and the gravity of such huge mass. That would mean that these cores are literally the largest diamonds imaginable... That would make the rest of the diamonds on earth essentially worthless if that was truly the story of these giant planets cores. Mining such a vast crystalline storehouse would of course be exceedingly difficult if not down right impossible. But it does make for a good story...

Answer 3

I don't know, maybe to expand our minds. Just from the technology used to go to the moon, we have made progress in the medical fields and have conveniences like microwaves. I think if we only had what is in front of us, we as humans would be bored. God gave us things to explore like these so-called useless planets.

Answer 4

I had always assumed all the gas planets had large iron cores, which is where their magnetic fields generate from.

Answer 5

Judging from their magnetic fields, atmospheric composition and models of formation we think they are ices (including water). Their movement in the surrounding liquids or slush would create their magnetic fields.

Answer 6

mainly they are made by gasses formed together to form a ball/sphere