1. cometa   satellite   planet   comet   orbit   Hint Half-n-half Clue   2. telescopio   telescope   moon   Earth   universe   Half-n-half Clue   3. universo   Earth   universe   meteorite   telescope   Half-n-half Clue   4. orbita   orbit   moon   universe   outer space   Half-n-half Clue   5. Spazio cosmico   outer space   atmosphere   comet   astronomer   Half-n-half Clue   6. stella   universe   star   astronomer   Earth   Half-n-half Clue   7. terra   universe   planet   Earth   solar system   Half-n-half Clue