Across
- 1. way a large system of stars,one of which is our star
- 4. the name of our planet
- 7. system a system of planets including Earth and Sun
- 8. chemical element which has a symbol H2
- 9. the force which keeps space objects toward one
Down
- 2. a period of 365 days
- 3. a huge ball of glowing gas
- 5. the sizt of the sun
- 6. a celestial body that is in orbit around the sun
- 7. our star