Across
- 2. a streak of light in earth s atmosphere made by a glowing meteoroid
- 4. A meteoroid that strikes a planet or a moon
- 6. The 4 largest moons of jupiter
- 8. Planets closest to the sun that are made of rocky materials
- 11. the time it takes an object to complete one rotation
- 12. a round depression formed on the surface of a planet or moon
Down
- 1. The time it takes for an object to travel once around the sun
- 3. when a planets atmosphere traps solar energy and causes the surface tempature to increase
- 5. A small rocky particle that moves through space .
- 7. The avergae distance from the earth to the sun.
- 9. An object made of gas and dust that orbits the sun
- 10. Millions of small rocky objects