Across
- 4. a region that contains all the planets , such as earth, mercury, venus, neptune, jupiter, mars, uranus, and saturn
- 12. when earth is exactly between the moon and the sun, and the moon passes through earth's shadow
- 13. the range of electromagnetic radiation arranged in order of energy level
- 14. an object that orbits the Sun and is big enough to be round but doesn't clear away all objects near its orbit
- 15. the stage of a star when it becomes very large and has a relatively cool surface
Down
- 1. the assemblage of objects, distances, and directions that you use to establish the location of something
- 2. a bright line of a spectrum, indicating the wavelength of emitted light
- 3. a theory that one explosion created the universe
- 5. a crater that has central peaks and ejecta thrown out in long rays
- 6. the reference star pointed to by earth's north pole
- 7. the region of the solar system beyond the orbit of neptune; plutoids are located here
- 8. the remains of organisms that lived long ago preserved as oil, coal, or natural gas
- 9. the name of the galaxy that our solar system is a part of
- 10. the phase of the moon that occurs when the moon is opposite the sun as seen from earth
- 11. the path one object takes to travel around another object