SolarParasite

SolarParasite t1_iu22rmu wrote

We don't know for sure, but was assume they all formed around 4.5-4.6 billion years ago. They where spinning around in a giant debris cloud collecting more and more material and slamming into each other until we had what we see today... or something like that.

So that means they are potentially made up of significantly different materials, perhaps like seams of materials in a mine the cloud was not likely to be evenly distributed and it's hard to say what's really on the inside. It's not like the planet are just blobs ejected from the sun that just happened to turn out that way, much of what they became is based on how they spun around that early cloud of debris and what they run into or what ran into them.

The bigger a protoplanet got the more stuff it could suck in until it was a planet and it was big enough to even absorb smaller planets and protoplanets or get absorb.

It was a game of absorb or get absorbed until they carved the relatively empty space you see today.

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