Across
- 1. A streak of ice, rock and gas that appears in the sky
- 4. The hottest planet
- 6. A ball of rock, magma and gas
- 8. The largest planet
Down
- 2. An object that orbits the Earth
- 3. A leftover chunk of rock from the formation of the planets
- 5. A bright burning ball of gas
- 7. The smallest planet