1. Earth   hoshi   kousei、wakusei   tenbungakusha   chikyuu   Hint Half-n-half Clue   2. satellite   taiyou   taiyoukei   eisei   tenbungakusha   Half-n-half Clue   3. solar system   kidou   taiyoukei   gingakei   juuryoku   Half-n-half Clue   4. star   hoshi   shouwakusei   kousei、wakusei   bouenkyou   Half-n-half Clue   5. outer space   taiki   uchuukuukan   uchuhikoushi   taiyou   Half-n-half Clue   6. asteroid   taiyou   tenbungakusha   uchuhikoushi   shouwakusei   Half-n-half Clue   7. planet   juuryoku   eisei   taiyoukei   kousei、wakusei   Half-n-half Clue