For the Solar System from its origins to the present, the current 1015 kg biomass over the past four billion years gives a time-integrated biomass (BIOTA) of 4·1024 kg-years. In comparison, carbon, nitrogen, phosphorus and water in the 1022 kg asteroids allows 6·1020 kg biomass that can be sustained with energy for the 5 billion future years of the Sun, giving a BIOTA of 3·1030 kg-years in the Solar System and 3·1039 kg-years about 1011 stars in the galaxy. Materials in comets could give biomass and time-integrated BIOTA a hundred times larger.