1. universo   universe   meteorite   galaxy   meteor   Hint Half-n-half Clue   2. años luz   planet   meteor   light years   atmosphere   Half-n-half Clue   3. atmósfera   universe   planet   atmosphere   star   Half-n-half Clue   4. galaxia   astronomer   star   galaxy   atmosphere   Half-n-half Clue   5. cometa   comet   astronomer   solar system   outer space   Half-n-half Clue   6. planeta   solar system   universe   meteor   planet   Half-n-half Clue   7. asteroide   meteor   asteroid   universe   moon   Half-n-half Clue