1. Astronom   orbit   Earth   astronomer   universe   Hint Half-n-half Clue   2. Umlaufbahn   orbit   telescope   planet   Sun   Half-n-half Clue   3. Mond   satellite   astronomer   moon   universe   Half-n-half Clue   4. helle Jahre   gravity   planet   light years   asteroid   Half-n-half Clue   5. System Sonnen   solar system   galaxy   gravity   orbit   Half-n-half Clue   6. Satellit   astronomer   satellite   comet   telescope   Half-n-half Clue   7. Weltall   comet   astronomer   asteroid   universe   Half-n-half Clue