Across
- 1. spins about its polar axis as it revolves around Earth
- 4. composed of high-density solid rock
- 5. occurs when Earth's shadow falls on the moon
- 7. cloud of gas and dust
- 10. The sun and planets formed together
Down
- 2. more widely spaced than the inner planets
- 3. massive stars become
- 6. what remains when a supergiant star collapses into itself
- 8. occur when the moon's shadow falls on part of Earth
- 9. cools for eons until it is too cold to emit light