1. terra   planet   galaxy   Earth   moon   Hint Half-n-half Clue   2. universo   Sun   universe   atmosphere   moon   Half-n-half Clue   3. astronauta   astronomer   universe   astronaut   moon   Half-n-half Clue   4. asteroid   atmosphere   universe   Sun   asteroid   Half-n-half Clue   5. pianeta   atmosphere   Sun   meteor   planet   Half-n-half Clue   6. Spazio cosmico   outer space   gravity   atmosphere   star   Half-n-half Clue   7. satellite   satellite   asteroid   galaxy   orbit   Half-n-half Clue