Across
- 3. The day night and day finally agree to split evenly
- 4. The path a body takes around something bigger
- 5. What gives a planet its day
- 7. A planet's invisible force field
- 8. How bright a star truly is, not just how it looks
- 9. The invisible leash keeping planets in line
- 10. A connect-the-dots picture written in stars
- 16. The thin blanket keeping a planet breathable — or not
- 17. Why a star seems to shift when you move
- 19. A shooting star that actually landed
- 20. A theoretical shortcut through spacetime
Down
- 1. A star's explosive final act
- 2. A world orbiting a star that isn't ours
- 6. Light stretching as something races away
- 11. When one celestial body photobombs another
- 12. The path something takes once it's launched
- 13. A cosmic nursery of gas and dust
- 14. Something that circles a bigger body, natural or man-made
- 15. Brings the impossibly far uncomfortably close
- 18. A rocky wanderer too small to be a planet