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