Sun spot?
(Other definitions for outer space that I've seen before include "Region beyond the earth's atmosphere" , "remote region" , "'place lacking atmosphere'" .)
(Other definitions for solar system that I've seen before include "Sun and the planets collectively" , "Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto" , "The sun and its associated bodies" , "Bodies around heater" , "Arrangement of planets around a sun" .)