1. Weltraum   astronomer   asteroid   outer space   moon   Hint Half-n-half Clue   2. System Sonnen   light years   solar system   meteorite   atmosphere   Half-n-half Clue   3. Stern   galaxy   star   satellite   planet   Half-n-half Clue   4. Komet   orbit   comet   astronaut   galaxy   Half-n-half Clue   5. Satellit   gravity   Sun   outer space   satellite   Half-n-half Clue   6. Planet   satellite   planet   astronaut   meteorite   Half-n-half Clue   7. Mond   star   atmosphere   moon   astronomer   Half-n-half Clue