1. galaxia   galaxy   light years   astronaut   meteorite   Hint Half-n-half Clue   2. luna   solar system   moon   meteor   Sun   Half-n-half Clue   3. órbita   meteor   orbit   comet   galaxy   Half-n-half Clue   4. estrella   meteor   Earth   universe   star   Half-n-half Clue   5. gravedad   astronaut   comet   gravity   satellite   Half-n-half Clue   6. telescopio   gravity   atmosphere   orbit   telescope   Half-n-half Clue   7. Tierra   star   Earth   meteorite   astronomer   Half-n-half Clue