1. espaço sideral   moon   astronomer   outer space   Sun   Hint Half-n-half Clue   2. atmosfera   telescope   satellite   atmosphere   galaxy   Half-n-half Clue   3. órbita   gravity   orbit   asteroid   comet   Half-n-half Clue   4. cometa   asteroid   comet   galaxy   gravity   Half-n-half Clue   5. astronauta   astronaut   satellite   moon   galaxy   Half-n-half Clue   6. planeta   astronomer   star   planet   comet   Half-n-half Clue   7. satélite   meteorite   universe   solar system   satellite   Half-n-half Clue