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).