1. atmosphere   asteroid   astronomo   atmosfera   stella   Hint Half-n-half Clue   2. comet   stella   satellite   astronomo   cometa   Half-n-half Clue   3. planet   sole   terra   pianeta   universo   Half-n-half Clue   4. Earth   terra   meteora   atmosfera   sole   Half-n-half Clue   5. satellite   sistema solare   satellite   atmosfera   pianeta   Half-n-half Clue   6. star   luna   pianeta   cometa   stella   Half-n-half Clue   7. solar system   luna   astronomo   astronauta   sistema solare   Half-n-half Clue