Across
- 4. – Rocky object orbiting the Sun, smaller than a planet
- 9. – Tool used to observe distant objects in space
- 11. – Rate of change of velocity
- 14. – Object that orbits a planet, natural or artificial
- 16. – All of space, time, matter, and energy
- 17. – The path one object takes around another
- 18. – Einstein’s theory describing space, time, and gravity
- 19. – A large body orbiting a star
Down
- 1. – A massive system of stars, dust, and gas
- 2. – Cloud of gas and dust where stars form
- 3. – Icy object with a glowing tail when near the Sun
- 5. – The Red Planet
- 6. – One complete orbit around another object
- 7. – Longest or shortest day of the year
- 8. – A streak of light from a rock burning in Earth’s atmosphere
- 10. – One celestial body blocking another
- 12. – Day when sunlight is evenly distributed across Earth
- 13. – A spinning motion around an axis
- 15. – Force that attracts objects with mass
- 20. – A person trained to travel into space