1. 隕石   meteorite   satellite   light years   telescope   Hint Half-n-half Clue   2. 月   outer space   moon   star   asteroid   Half-n-half Clue   3. 恒星、惑星   gravity   planet   asteroid   solar system   Half-n-half Clue   4. 宇宙空間   star   planet   outer space   asteroid   Half-n-half Clue   5. 軌道   solar system   orbit   light years   comet   Half-n-half Clue   6. 宇宙飛行士   moon   star   planet   astronaut   Half-n-half Clue   7. 衛星   light years   atmosphere   satellite   comet   Half-n-half Clue