The correct metric for comparing mountain amazingness is the mountain's potential energy per unit mass, i.e. height (above mean surface) times g where g is the acceleration of local gravity. NAME.................HEIGHT...........g..................PRODUCT Maxwell Montes(Venus)..11000...8.87..................97570 Mt.Everest............8848m........9.798 m/sec^2.....86693 (m/sec)^2 Olympus Mons(Mars)..21171........3.71.....................78544 Caloris Montes(Merc)...1-3km.....3.7.....................3700-11100 Pluto 11kft mtn..........3353.........0.58....................1945 Given that Jupiter, Saturn, Uranus, Neptune do not have a solid surface (at least not that we can perceive) the champion is on Venus among the 9 planets they used to call planets, Earth is the runner-up. Looking at some nonplanets Mons Huygens(Moon)....4700-5400m......1.62.......7614-8748 Rheasilvia(Vesta).....22km?........0.25....................5500 5km Mtn(Ceres)........5km............0.29.....................1450 18km Mtn(Io)............18km...........1.796...................32000 20km Mtn(Iapetus)......20km.........0.224..................5000 we see that they cannot compete with Mars, Venus, Earth. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)