1. Tierra   Earth   gravity   satellite   meteor   Hint Half-n-half Clue   2. planeta   gravity   atmosphere   outer space   planet   Half-n-half Clue   3. sistema solar   Earth   telescope   solar system   astronaut   Half-n-half Clue   4. luna   meteorite   orbit   comet   moon   Half-n-half Clue   5. gravedad   meteorite   universe   gravity   outer space   Half-n-half Clue   6. sol   Sun   satellite   meteorite   atmosphere   Half-n-half Clue   7. órbita   orbit   asteroid   astronomer   Sun   Half-n-half Clue