Scientific cosmology is usually described as being the science of the universe as a whole. In it, the phrases "universe" and "cosmos" are frequently made use of as synonyms for that phrase "planet".[twelve] One typical definition of the whole world/universe present in this discipline is as "[t]he totality of all https://namthuanloi93725.get-blogging.com/36855180/the-2-minute-rule-for-namthuanloi