Across
- 3. Closest planet to earth
- 6. The total sum of all matter and energy
- 10. A group of stars that create a pattern in the sky
Down
- 1. Cosmic snowballs made up of frozen gases
- 2. Made up of mainly hydrogen and helium
- 4. The largest moon in the solar system
- 5. Solid rocky and metal bodies found throughout the solar system
- 7. Its rotation is approximately 27 days
- 8. Has a temperature of about -212°C
- 9. Large balls of hot gas
- 11. Average size star that appears yellow when viewed from Earth but is white when viewed from space.