1. astronomer   inseki   bouenkyou   tenbungakusha   uchuu   Hint Half-n-half Clue   2. asteroid   tsuki   shouwakusei   taiki   taiyou   Half-n-half Clue   3. atmosphere   ryuusei   uchuukuukan   uchuu   taiki   Half-n-half Clue   4. comet   uchuhikoushi   shouwakusei   suisei   tsuki   Half-n-half Clue   5. Earth   chikyuu   taiyou   eisei   gingakei   Half-n-half Clue   6. star   juuryoku   bouenkyou   hoshi   shouwakusei   Half-n-half Clue   7. meteorite   kidou   kousei、wakusei   inseki   uchuhikoushi   Half-n-half Clue