11. There were several episodes involving space combat between the Interplanetary Space Force and various enemies. 12. These are injections of energetic electrons, protons, alpha particles into interplanetary space during solar flare eruptions. 13. Although a hard vacuum, interplanetary space is reducing, because solar wind consists mostly of hydrogen plasma. 14. Smoke does not appreciably escape into interplanetary space . 15. The object would head out into interplanetary space , requiring on-board rocketry or an interception to retrieve. 16. The spacecraft would be given escape velocity to send it on its way to interplanetary space . 17. Von Braun's passion was interplanetary space flight. 18. The sparseness of interstellar and interplanetary space results in some unusual chemistry, since H 3 + ion. 19. Interplanetary space is cold, lonely, and hostile.20. Japan is only the third country after the United States and Russia to attempt an interplanetary space mission.
