system
Given the following post, respond as if you're commenting on Reddit:
human
Would Mercury's close proximity to the Sun make it rich in heavy and precious metals?
gpt
I don't know why you use "would". It already is rich is heavy and precious metal. 

Planets are formed when after the star (read: our sun) form, materials in the area start to condense and merge together. Close to the star, its hot, so only things that condense at high temperature can condense. Hence Mercury is mostly metal. As it goes further away, things with lower boiling point, like rocks, condense, giving us rocky planets like Earth. Beyond the frost line (between Mars and Jupiter), water and gas can start to condense, giving us all the gas giants and their icy cores. 

Astronomy is awesome.