the gravitational releasing of the sun on space 's job desert the sorting
gravitational_field is field. everything has own_gravitational_force gravitational_force_function is function. closed_universe is universe. gravitational_force_function is force_function. cosmic_dust is cloud. gravitational_waves is ripples_in_fabric_of_space_time. stages is usually_on_land. mapping_universe is massive_task. nasa_space_mission is space_exploration.