sentences: comets orbit the sun in the solar system
docs: interstellar_comet is exosolar_comet. comets has solid_nucleus mars is planet_in_solar_system. comets has set_orbits comets has ice comet is subplanetary_stellar_orbiter. comet is astronomical_object. interstellar_comet is extrasolar_comet. periodic_comet is comet. comet is icy_planetary_body.