1. outer space   uchuukuukan   eisei   suisei   uchuhikoushi   Hint Half-n-half Clue   2. astronomer   juuryoku   tenbungakusha   kounen   hoshi   Half-n-half Clue   3. astronaut   uchuukuukan   uchuhikoushi   hoshi   kousei、wakusei   Half-n-half Clue   4. asteroid   bouenkyou   shouwakusei   kidou   tsuki   Half-n-half Clue   5. light years   taiyou   kounen   taiyoukei   suisei   Half-n-half Clue   6. satellite   shouwakusei   kounen   eisei   taiyou   Half-n-half Clue   7. planet   kousei、wakusei   suisei   taiyou   gingakei   Half-n-half Clue