sentences: the gravitational releasing of the sun on space 's stir cooler the leaves
docs: all_matter is inside_outer_space. expansion_of_universe is speeding_up. closed_universe is universe. global_warming is opening_northwest_passage_to_china. cosmic_dust is cloud. sun's_light is what_heats_earth. when_water is heated_becomes_water_vapor. universe has sun_and_earth cosmic_background_radiation is cosmic_radiation. outside_atmosphere is called_outer_space.