Mercury The closest planet to the Sun and the smallest planet in the Solar System, it has no natural satellites. 0.01295681063 http://moonlady.com/wp-content/uploads/2013/02/Mercury.jpg Venus This planet is much drier than Earth, and its atmosphere is ninety times as dense. 0.02325581395 http://www.windows2universe.org/venus/images/venus_med.jpg Earth The largest and densest of the inner planets. 0.03322259136 http://www.openthefuture.com/images/sunset.jpg Mars The largest and densest of the inner planets. 0.04983388704 http://artselectronic.files.wordpress.com/2013/08/mars2.jpg Jupiter The largest planet in the solar system and has roughly 2.5 times the mass of all the other planets combined. It's also the fastest spinning planet. 0.17275747508 http://en.wikipedia.org/wiki/File:Jupiter_by_Cassini-Huygens.jpg Saturn The least dense planet in the solar system. It has 62 moons, including some believed to possibly contain life. 0.31561461794 http://upload.wikimedia.org/wikipedia/commons/c/c7/Saturn_during_Equinox.jpg Uranus The coldest planet in our solar system with temperatures as low as -224C 0.63787375415 http://clarkplanetarium.org/wp-content/uploads/uranus-planet.jpg Neptune The most distant planet from earth in our solar system and the smallest of the gas giants. 1 http://images1.wikia.nocookie.net/__cb20090222230617/spore/images/1/15/Neptune.png