Across
- 1. the smallest planet in the solar system
- 3. hottest planet in the solar system
- 5. only planet with life in it
- 6. 4.5 billion year old star
- 7. we live in the milky way ____________
- 8. something we see in the sky during night time
Down
- 2. contains 100-200 billion galaxies
- 4. our “space nieghborhood”