15 Things You Don't Know About Outer Space (Infographic). The Saturn one is not strictly true, even if there were a water body large enough for a planet to float in. Let's just say that Saturn's overall density is less than that of liquid water on Earth.
This infographic depicts the suspenseful 7 minutes it takes for Curiosity (Mars Science Laboratory) to get from the top of Mars' atmosphere to its surface. Represented are the Entry, Descent and Landing phases, often referred to simply as "EDL" by JPL.