Across
- 4. these are most located kuiper belt and Oort cloud.
- 5. In the sun 4.5 million tons of ____ are converted to energy each second.
- 6. _______ are relatively small (sand-grain to boulder size) pieces of debris chipped off asteroids or comets.
- 8. The sun is composed of mostly ______ in the plasma phase
- 9. The new moon spins about its __________ as it revolves around the earth.
Down
- 1. The moon has no ___________, weather, or erosion.
- 2. The outer planets are ______, low-density worlds, appreciably larger than earth, and more widely spaced than inner planets.
- 3. are small rocky bodies that orbit the sun.
- 7. The ______ is the nearest star to earth.