system
Given the following post, respond as if you're commenting on Reddit:
human
Are the rare elements on earth proportionately rare throughout the solar system and universe?

Speaking of things like gold, platinum, osmium, rhodium, etc.  For instance, would any given moon of Jupiter have the same proportions as Earth?

If the distribution is uneven, why?
gpt
Pretty much actually. Any element heavier than iron can only be forged in a supernova explosion. And factor in decays of some elements that you lose, and gain a few more as stable decay products, yeah pretty much even throughout the universe. That being said, some elements are more rock-friendly and they're up in the crust, while others are more metal-friendly and down in the core of the earth, so that's a factor too, but one we'd expect to be present on any rocky planet like earth.