1. orbite   satellite   orbit   galaxy   astronaut   Hint Half-n-half Clue   2. système solaire   asteroid   meteor   telescope   solar system   Half-n-half Clue   3. météore   Earth   solar system   meteor   satellite   Half-n-half Clue   4. comète   star   Earth   satellite   comet   Half-n-half Clue   5. terre   Sun   outer space   asteroid   Earth   Half-n-half Clue   6. astéroïde   asteroid   galaxy   gravity   orbit   Half-n-half Clue   7. satellite   star   astronomer   satellite   comet   Half-n-half Clue