Across
- 1. An explosion that's capable of destroying stars
- 3. A slowly cooling sphere of carbon
- 5. A larger nucleus is formed when several smaller nuclei fuse together
- 6. An object that orbits outside the atmosphere of a planet and observes what goes on below
- 10. A tide just after a full moon
- 11. An object that's gravity is so great, it pulls in everything; including light
- 15. The path an object follows as it revolves around another object
- 17. The amount of gravitational force on an object
- 18. A spacecraft that collects scientific information about a planet, moon, or asteroid
- 19. Seven days after a spring tide
- 23. The force the Earth exerts to keep your feet on the ground
- 25. Rings that rotate around a planet
Down
- 2. The pattern of lines when light passes through a prism
- 4. A large sphere of hydrogen gas
- 7. The distance light travels in a year
- 8. An instrument that separates light into different wavelengths
- 9. A device that astronomers use to view the stars
- 11. The scientific theory about the beginning of the universe
- 12. The shift to a different wavelength
- 13. A cloud of gas and dust
- 14. Our home galaxy
- 16. Planets, galaxies, stars, and solar systems are all included in this.
- 20. A massive collection of stars, gas, and dust
- 21. The rising and falling of the ocean's surface due to the gravitational pull of the moon
- 22. A graph that plots how bright versus how hot a star is
- 24. The amount of matter in an object