Across
- 3. a moon outside our solar system
- 6. The star that is the main source of light at the center of our solar system
- 7. the relative size of things
- 10. to shine light on an object and make it visible
- 12. Eclipse when the moon is completely dark
- 13. moon a moon phase in which the moon is not visible from Earth
- 14. a planet outside our solar system
- 17. the border between light and dark on the moon
- 18. moon a moon phase that looks like a half circle from Earth
Down
- 1. moon a moon phase that looks like more than half a circle from Earth
- 2. a rocky sphere that travels around a planet
- 4. moon a moon phase that looks like a full circle from Earth
- 5. an object, diagram, or computer program that helps us understand something by making it simpler or easier to use
- 6. system the sun, the planets that orbit the sun, and other objects that orbit the sun
- 8. moon a moon phase that looks like less than half a circle from Earth.
- 9. something we observe to be similar over and over again
- 11. phases the shape of the illuminated part of the Moon as it appears from Earth
- 15. The nearly circular path of a smaller object (like the moon) travels around a larger object (like the Earth)
- 16. the amount of time it takes for a planet to complete on orbit around a star of stars