text: Typical galaxies range from dwarfs with as few as ten million ( 107 ) stars up to giants with one trillion ( 1012 ) stars , all orbiting the galaxy 's center of mass. .
simplified: Typical galaxies range from dwarf galaxys with as few as ten million ( 107 ) stars up to giants with one trillion ( 1012 ) stars , all orbiting the galaxy 's center of mass. .