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I'm formulating a planet that has silver dust on its surface, and ideally has rivers of mercury flowing on it, possible? Human survival not necessary

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I'm new to this and my scientific knowledge is massively lacking in this area (so please take it easy on me!) I'm writing a historical science-fiction novel. Parts of it set in the past (1977) and some of it set in the not so distant future.

I need to create a planet that has a layer of silver dust (not necessarily the element/metal silver, but silver in appearance) that covers the entire planet's surface. From a distant solar system, does not need to be similar to our solar system. I would also like to include rivers/lakes of mercury on the surface of the planet. Is it possible for a planet like this to exist and what would its chemical make-up be? Humans do not need to be able to survive there or even visit. Just two metal robots/spacecrafts... one is from Earth (launched 1977, Voyager) and one is from another planet (Robot, very sophisticated).

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This post was sourced from https://worldbuilding.stackexchange.com/q/173633. It is licensed under CC BY-SA 4.0.

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