from the smallest known things in the universe to the single biggest thing
YM=Yoctometer ZM=Zeptometer AM=Attometer FM=femtometer PM=Picometer NM=Nanometer µM=Micrometer MM=milimeter CM=centimeter M=meter KM=kilometer MM=Megameter GM=Gigameter TM=Terameter PM=Petameter LY=Light Year GLY = giga light year
