1. satellite   astronomer   comet   satellite   planet   Hint Half-n-half Clue   2. étoile   telescope   star   outer space   planet   Half-n-half Clue   3. météore   solar system   planet   meteor   telescope   Half-n-half Clue   4. planète   planet   comet   outer space   atmosphere   Half-n-half Clue   5. comète   moon   planet   comet   galaxy   Half-n-half Clue   6. lune   asteroid   universe   moon   meteor   Half-n-half Clue   7. atmosphère   planet   astronomer   atmosphere   outer space   Half-n-half Clue