1. taiki   astronaut   atmosphere   planet   Earth   Hint Half-n-half Clue   2. hoshi   Earth   meteorite   astronomer   star   Half-n-half Clue   3. tsuki   moon   Sun   meteorite   planet   Half-n-half Clue   4. uchuukuukan   orbit   outer space   Sun   astronaut   Half-n-half Clue   5. kousei、wakusei   planet   solar system   astronomer   moon   Half-n-half Clue   6. ryuusei   satellite   meteor   telescope   astronomer   Half-n-half Clue   7. gingakei   satellite   galaxy   astronomer   universe   Half-n-half Clue