1. eisei   gravity   asteroid   satellite   light years   Hint Half-n-half Clue   2. taiyoukei   meteor   meteorite   solar system   Sun   Half-n-half Clue   3. hoshi   light years   astronomer   atmosphere   star   Half-n-half Clue   4. bouenkyou   outer space   Earth   telescope   planet   Half-n-half Clue   5. inseki   meteorite   atmosphere   universe   asteroid   Half-n-half Clue   6. kounen   solar system   moon   orbit   light years   Half-n-half Clue   7. tsuki   atmosphere   satellite   moon   solar system   Half-n-half Clue