Could you clarify again how we will define the planets? What would we say Sun denotes? The Ego (Aham)? The Moon is the Mind (Manas)? Is that correct?
What words would we use best for the other planets, both in Sanskrit and in English?
Ernst's book - Graha Sutras - has amazing answers in regards to these, and a long list of Sanskrit and English names for the planets, and their meanings. I think the book comes in electronic version as well, but not entirely sure...There is a wealth of information there if you ever feel like exploring.