1. astronomer   astronomo   luna   cometa   meteora   Hint Half-n-half Clue   2. Earth   meteorite   terra   sole   astronauta   Half-n-half Clue   3. telescope   sole   telescopio   anni chiari   cometa   Half-n-half Clue   4. planet   galassia   orbita   pianeta   sole   Half-n-half Clue   5. meteor   pianeta   meteora   sole   sistema solare   Half-n-half Clue   6. comet   terra   sistema solare   cometa   atmosfera   Half-n-half Clue   7. atmosphere   atmosfera   luna   pianeta   cometa   Half-n-half Clue