The planetsTheplanets kirsty ForshawkirstyForshaw Mercury is 36 millionMercuryis36million miles away from the sun.milesawayfromthesun. Mercury whizzes aroundMercurywhizzesaround the sun at 30 miles perthesunat30milesper second.second. Mercury is the closestMercuryistheclosest to the suntothesun Mercury is the eightMercuryistheeight largest planetlargestplanet Mercury has its nameMercuryhasitsname because it moves sobecauseitmovesso quickly across the skyquicklyacrossthesky