Across
- 3. A new idea, method, or device.
- 5. The capacity to develop or succeed.
- 6. Related to the atmosphere of Earth or another planet.
- 8. Related to stars.
- 9. A well-substantiated explanation of some aspect of the natural world.
- 10. Moral principles that govern behavior.
- 12. Unusually good or outstanding.
- 13. To keep away from or stop oneself from doing something.
- 16. A statement that seems contradictory but may be true.
- 18. Related to the sun.
- 19. To work together with others.
- 21. A person trained to travel in space.
Down
- 1. Able to maintain itself without external assistance.
- 2. The act of intentionally ending a life to relieve pain or suffering.
- 3. Occurring at the beginning.
- 4. Originating outside Earth.
- 7. The path one object takes around another in space.
- 11. A secret plan by a group to do something unlawful or harmful.
- 14. A proposed explanation based on limited evidence.
- 15. Related to the moon.
- 17. Copilot
- 20. An object that orbits a planet or star.