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