Sometimes it can be very hard to tell whether a statement is a fact or an opinion . One good way to learn the difference between fact and opinion is to study some examples. In the following three sentences, two are facts and one is an opinion .
Earth is a planet where animals and plants can live.
Earth is the third planet from the sun. Earth is the most beautiful planet. You got out of correct. Earth is the most beautiful planet is an opinion. Some people believe that Saturn, with its beautiful rings, is the most beautiful planet.