Labels:cell | circle | clock | crt screen | monitor | road | sky | tree OCR: LAF TEM HELIOS PHERE Data SOLAR APEX TERMINATION most The boundary heliopause of is the the solar outer wind, SHOCK where the interstellar medium HELIOPAUSE restricts the outward flow of the solar wind and confines it within INTERSTELLAR sphere. magnetic The bubble solar called wind is the made helio- up WINDS VOYAGER of electrically charged atomic part- EARTH icles composed primarily of ion- SUN SATURN ized ward from hydrogen, the Sun that stream out- 0 URANUS PIONEE: Exactly where the heliopause PIONEER s has been one of the great un- NEPTUNE JPPPPPR PLUTO physics. answered By questions studying in the space radio emissions scientists now theorize the heliopause exists some 90 120 AU) VOYAGER from the Sun. The Voy- ager probes, which are now in the process of leaving the solar system sho ...