The document summarizes key facts about the planets in our solar system. It describes Mercury as the smallest planet with a rocky body like Earth. Venus has a dense atmosphere that traps heat, making it the hottest planet. Earth is located in the third orbit from the sun and has liquid water and an atmosphere suitable for life. Mars is smaller than Mercury and has surface features resembling impact craters on the moon. Jupiter is the largest planet and made of gas like Saturn, Uranus and Neptune, which are also described briefly in the summary.