1. astronomo   orbit   Sun   Earth   astronomer   Hint Half-n-half Clue   2. anni chiari   light years   meteor   astronaut   planet   Half-n-half Clue   3. astronauta   satellite   galaxy   astronaut   star   Half-n-half Clue   4. telescopio   moon   galaxy   telescope   astronaut   Half-n-half Clue   5. asteroid   asteroid   light years   astronomer   moon   Half-n-half Clue   6. pianeta   outer space   planet   Sun   gravity   Half-n-half Clue   7. stella   planet   star   astronomer   astronaut   Half-n-half Clue