Across
- 3. the path the Sun appears to move across the sky
- 5. natural objects that orbit planets
- 8. the path an object takes around another object in space
- 9. a small celestial body that orbits the Sun but is not considered a full planet
- 12. Moon phase where the entire visible side is illuminated
- 14. very large planets mostly made of gas
- 16. Moon phase when the Moon cannot be seen from Earth
- 17. energy that travels as waves such as visible light, radio waves and X-rays
- 18. the force that attracts objects with mass toward each other
- 19. the time it takes Earth to travel around the Sun once
Down
- 1. oval shaped paths that planets follow when orbiting the Sun
- 2. a model of the solar system with the Sun at the centre
- 3. planets that exist outside our solar system
- 4. region in space where gravity is so strong that even light cannot escape
- 6. darker cooler areas on the surface of the Sun
- 7. the time it takes a planet to complete one orbit around the Sun
- 10. the full range of all types of electromagnetic radiation
- 11. a model of the solar system with Earth at the centre
- 13. a year with 366 days that occurs every four years
- 15. imaginary line the Earth spins around