Across
- 5. The "point of no return" around a black hole
- 6. The huge area outside Earth where plants and stars are
- 10. The tiny point in the center of a black hole
- 11. A huge group of stars, dust, and planets
- 12. Shining with a lot of light
- 13. To travel in a circle around something
- 14. The very middle of something
Down
- 1. What clocks measure; it slows down near a black hole
- 2. A giant ball of hot gas that shines in space
- 3. How much "stuff" an object has
- 4. the force that pulls things towards each other
- 5. Power that makes things more or change
- 7. Invisible energy that can travel through space
- 8. What we see with; it cannot escape a black hole
- 9. A place in space with gravity so strong that nothing can escape