1. pianeta   planet   telescope   asteroid   Sun   Hint Half-n-half Clue   2. telescopio   solar system   gravity   atmosphere   telescope   Half-n-half Clue   3. sistema solare   solar system   Earth   meteor   universe   Half-n-half Clue   4. astronauta   astronaut   astronomer   orbit   planet   Half-n-half Clue   5. atmosfera   astronaut   meteor   solar system   atmosphere   Half-n-half Clue   6. terra   Earth   asteroid   astronomer   telescope   Half-n-half Clue   7. stella   meteor   light years   star   meteorite   Half-n-half Clue