1. comet   cometa   atmosfera   astronauta   luna   Hint Half-n-half Clue   2. orbit   anni chiari   meteora   orbita   universo   Half-n-half Clue   3. planet   satellite   telescopio   pianeta   astronauta   Half-n-half Clue   4. outer space   Spazio cosmico   asteroid   galassia   meteorite   Half-n-half Clue   5. atmosphere   meteorite   orbita   terra   atmosfera   Half-n-half Clue   6. moon   luna   satellite   sole   gravità   Half-n-half Clue   7. Earth   telescopio   atmosfera   terra   pianeta   Half-n-half Clue