Across
- 3. Giant gas planets extremely close to their stars
- 5. Planets that orbit stars outside our solar system
- 7. A planet’s shell of gases
- 8. Life that may exist beyond Earth
- 9. System with seven Earth-sized planets
- 11. Chemical signals that could indicate life
- 12. Region around a star where liquid water can exist
- 13. Rocky planets larger than Earth
Down
- 1. Detecting planets by a star’s slight dimming
- 2. Studying light to identify chemicals
- 4. Finding planets by measuring a star’s wobble
- 6. Telescope that analyzes distant atmospheres
- 10. Distance that light travels in one year