99.9% of the mass 99.9% of the mass 99.9% of the mass University of California, San Diego 99.9% of the mass containing 99.8% of ALL the mass in our solar system 99.9% of the mass 99.9% of the mass 99.9% of the mass The rest of the solar system's mass is split 99.9% of the mass 99.9% of the mass 99.9% of the mass 99.9% of the mass 99.9% of the mass