1. 望遠鏡   solar system   Sun   light years   telescope   Hint Half-n-half Clue   2. 光年   meteorite   light years   Earth   asteroid   Half-n-half Clue   3. 宇航員   meteorite   meteor   solar system   astronaut   Half-n-half Clue   4. 太陽   astronomer   galaxy   Sun   Earth   Half-n-half Clue   5. 行星   outer space   astronaut   planet   asteroid   Half-n-half Clue   6. 宇宙   universe   comet   galaxy   satellite   Half-n-half Clue   7. 月亮   moon   meteorite   outer space   astronomer   Half-n-half Clue