1. atmosphère   meteorite   comet   solar system   atmosphere   Hint Half-n-half Clue   2. astronome   astronaut   comet   astronomer   meteor   Half-n-half Clue   3. météorite   meteorite   satellite   asteroid   comet   Half-n-half Clue   4. soleil   Sun   Earth   atmosphere   asteroid   Half-n-half Clue   5. météore   meteor   Sun   orbit   light years   Half-n-half Clue   6. lune   astronomer   Earth   planet   moon   Half-n-half Clue   7. télescope   gravity   satellite   astronomer   telescope   Half-n-half Clue