1. yun [dan;shi]   outer space   astronaut   meteorite   Sun   Hint Half-n-half Clue   2. xing   orbit   star   astronomer   galaxy   Half-n-half Clue   3. tai yang   gravity   solar system   orbit   Sun   Half-n-half Clue   4. [xing;hang] xing   meteorite   light years   solar system   planet   Half-n-half Clue   5. tian wen xue [jia]   meteor   moon   astronomer   astronaut   Half-n-half Clue   6. gui dao   orbit   meteor   galaxy   asteroid   Half-n-half Clue   7. yu hang [yuan]   astronaut   light years   gravity   solar system   Half-n-half Clue