Across
- 4. one of the two theories about the origin of the Earth
- 7. capability of being inhabited
- 8. a hard outer layer of something
- 9. a region around a magnetic material within which the force of magnetism acts.
Down
- 1. a planet outside the solar system
- 2. the center or most important part of something
- 3. the force that attracts a body toward its center
- 5. also known as "Geosphere"
- 6. the Greek word for "life"
- 7. an online database of potentially habitable worlds discoveries; an acronym