Across
- 2. A region in space where gravity is so strong that light cannot escape
- 4. The path followed by a planet around a star
- 6. A glowing ball of gas that produces its own light and heat
- 7. A huge system of billions of stars held together by gravity
- 8. A powerful explosion marking the death of a massive star
- 10. The theory that explains how the universe began
Down
- 1. A group of stars forming a pattern in the sky
- 3. Everything that exists: space, time, matter, and energy
- 5. An instrument used to observe distant objects in space
- 9. A cloud of gas and dust where stars are formed