1. Atmosphäre   asteroid   atmosphere   solar system   comet   Hint Half-n-half Clue   2. Astronom   astronaut   astronomer   star   light years   Half-n-half Clue   3. Asteroid   comet   planet   asteroid   orbit   Half-n-half Clue   4. Stern   star   meteor   planet   meteorite   Half-n-half Clue   5. Astronaut   solar system   satellite   astronaut   Sun   Half-n-half Clue   6. Komet   comet   outer space   asteroid   astronaut   Half-n-half Clue   7. Meteor   astronomer   Sun   meteor   universe   Half-n-half Clue