 Mercury , Venus , Earth , and Mars can all appear to cross the Sun , or transit it , from a <unk> point on Ceres . The most common transits are those of Mercury , which usually happen every few years , most recently in 2006 and 2010 . The most recent transit of Venus was in 1953 , and the next will be in <unk> ; the corresponding dates are 1814 and <unk> for transits of Earth , and 767 and <unk> for transits of Mars . 
