Across
- 1. set of criteria or stated values in relation to which measurements or judgments can be made
- 8. space object similar to but not quite a planet
- 9. the force that attracts objects to the core of a planet
- 11. spectrum of light radiation
- 13. moment in time when the Sun crosses the Earth's equator
- 14. a phase of the moon, the moon is fully lit
- 15. relating to the moon
Down
- 2. lines, or lines of increased intensity, on a continuous spectrum
- 3. areas of the Moon
- 4. (of the moon) having the observable illuminated part greater than a semicircle and less than a circle.
- 5. area of our solar system beyond Neptune
- 6. when the Moon moves into the Earth's shadow
- 7. nonrenewable source of energy
- 10. a collection of solar systems and other space objects
- 12. planet outside the solar system