Across
- 2. The farthest known type of space object that releases huge amounts of energy.
- 5. A glowing ball of gas held together by gravity.
- 7. The invisible force that pulls objects toward each other.
- 9. A gigantic explosion that marks the death of a massive star.
- 10. A telescope that orbits Earth and observes deep space.
- 12. A rotating celestial body that orbits a star.
- 14. A space object made of ice and dust with a tail.
Down
- 1. The red planet, fourth from the Sun.
- 3. The entirety of space, time, matter, and energy.
- 4. matter The invisible matter that makes up most of the universe's mass.
- 6. The path an object takes as it revolves around another object in space.
- 7. A huge system of stars, dust, and gas held together by gravity.
- 8. The star at the center of our solar system.
- 11. The first event that began the universe.
- 13. The third planet from the sun, our home.
- 15. A natural satellite that orbits Earth.