1. étoile   star   meteor   astronaut   astronomer   Hint Half-n-half Clue   2. astéroïde   Earth   asteroid   galaxy   universe   Half-n-half Clue   3. astronaute   light years   Sun   meteor   astronaut   Half-n-half Clue   4. planète   star   asteroid   Sun   planet   Half-n-half Clue   5. atmosphère   meteor   atmosphere   universe   orbit   Half-n-half Clue   6. comète   atmosphere   orbit   comet   Earth   Half-n-half Clue   7. terre   orbit   star   light years   Earth   Half-n-half Clue