Do gas giants actually have a solid core? If so, how big are they usually?

Question

Do gas giants actually have a solid core? If so, how big are they usually?

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Answer 1

>Do gas giants actually have a solid core? If so, how big are they usually?

Nobody knows for sure. We know our own planet’s core because we used seismometers to listen to the sound waves as earthquakes and explosives bounced off of the various layers.

In order to do anything like that with a gas giant, we would have to hang multiple strings of microphones from balloons floating in the atmosphere, then set off powerful explosives, possibly nukes, to generate a sound wave that can propagate through the gas giant’s atmosphere and be detectable to the microphones.

Until that happens, the most we can do is speculate.