Structure of the Milky Way?

Constantin

"How long will keep it's atmosphere?
Tousands, M\Hundreds of tousands, Millions, Tens of millions of years... BILLIONS????"
Billions of years, at least. There are plenty of examples of gas giants that orbit their stars very closely. It is assumed they formed further away and they later migrated closer to the star.

"but Would't the rocky core get crushed under the mass of the atmosphere and become a liquid... Or diamonds if it has a significant ammount of carbon?"
Yes, because of the very high amounts of pressure, it will change its state. I don't know if it will be molten or not.
But that happens in the core of our planet as well. The very core of our planet is solid, surrounded by a larger, molten region. So at extreme pressures you can get a solid core even with very high temperatures.

Dark Universe

With that i agree with you...
-But this kind of event can hapopen to any kind of material even water...
Recent discoveries of theoretical ocean worlds or super earths that are almost 100% water, if they are big enaugh their core can get solid; ice7, right?
And what about the recently discovered Kepler-22b?
Studies show that it could be another ocean world...
I don't quite remember its theoretical size but could it have a rocky underwater surface or its all the way down to another ice7 core?
-And could it have small rocky islands?
-Could it be colonized?

Dark Universe

Heeey... no answer to this????

Whovian

No, puting a liquid under ridiculous amounts of pressure (with a few exceptions such as water and gallium) results in a solid, not the other way around.

TheTechNoir

as far as I know, with water it's even believed that under sufficiently extreme pressures an exotic or exotic forms of ice can be formed.

Constantin

True. The molten core is a result of temperature, not pressure.
However, what you're saying about water or gallium is false. They will turn to solid just fine.

In regards to water turning to ice at high pressure, I've seen experiments with diamond anvil doing just that.

Whovian

In which case I stand corrected.