These giant molecular clouds have typical densities of 100 particles per cm3 , diameters of , masses of up to 6 million solar masses ( ) , and an average interior temperature of 10 K .
The largest such formations , giant molecular clouds , have densities of 100 particles per cm3 , diameters of 100 ly , and masses up to 6 million solar masses , and an average interior temperature of 10 K .