1. こうせい、わくせい   comet   planet   star   telescope   Hint Half-n-half Clue   2. ぎんがけい   galaxy   solar system   meteorite   outer space   Half-n-half Clue   3. きどう   Sun   orbit   solar system   meteor   Half-n-half Clue   4. いんせき   universe   Earth   star   meteorite   Half-n-half Clue   5. しょうわくせい   comet   Sun   asteroid   orbit   Half-n-half Clue   6. えいせい   orbit   moon   Sun   satellite   Half-n-half Clue   7. たいよう   meteor   gravity   outer space   Sun   Half-n-half Clue