Across
- 1. An imaginary line that passes through a planet's center adn its north and south pole, about which the planet rotates
- 3. The alternate rising and falling of the sea usually twice in each lunar day at a particular place, due to the attraction of the moon and sun
- 6. The fully shaded inner region of a shadow cast by an opaque object,
- 8. A distinct period or stage in a series of events or a process of change or development
- 9. Either of the two days of the year on which the sun reaches iths greatest distance north or south of the equator
- 10. The moment of an object around another object
- 11. A loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit
- 12. A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
- 14. The partially shaded outer region of the shadow cast by an opaque object
- 16. An eclipse in which the moon appears darkened as it passes into the earth's shadow.
- 18. Large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions
- 19. A tide just after a new or full moon when there is the greatest difference between high and low water
- 21. A law stating that any two masses attract each other with a force equal to a constant
- 23. The force that attracts a body toward the center of the earth
- 24. An object that orbits a star, and large enough to be rounded by its own gravity, and has cleared the area of it's orbit
Down
- 2. A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion
- 4. An object that orbits the planet
- 5. A hollowed-out area, produced by the impact of a meteorite, volcanic activity, or an explosion.
- 7. A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere
- 9. An eclipse in which the sun is obscured by the moon
- 11. A pattern or grouping of stars that people imagine to represent a figure or object
- 13. Either of the two days of the year on which neither hemisphere
- 15. The spinning motion of planet on its axis
- 17. A system of organizing time that defines the begining, length, and divisions of a year
- 20. A tide just after the first or third quarters of the moon when there is least difference between high and low water
- 22. The path of an object as it revolves around another object in space
