Wheres the multiple choice question?
Answer:
A galaxy is a collection of millions of stars, while a solar system is a star and the planets around it.
Explanation:
You live in a solar system, we revolve around our sun and so do the other planets making up a solar system
Binomial nomenclature is naming a organism by its genus and species the rules are the genus always comes first and the first letter is capitalized and the species always comes second and is lower case so the mountain lion would be Felis concolor