1. galassia   solar system   galaxy   planet   gravity   Hint Half-n-half Clue   2. Spazio cosmico   astronaut   outer space   moon   astronomer   Half-n-half Clue   3. stella   satellite   comet   light years   star   Half-n-half Clue   4. luna   moon   universe   meteor   Earth   Half-n-half Clue   5. sole   Sun   meteorite   meteor   orbit   Half-n-half Clue   6. telescopio   Earth   satellite   galaxy   telescope   Half-n-half Clue   7. sistema solare   light years   Earth   universe   solar system   Half-n-half Clue