Across
- 2. The slant of Earth’s axis, which is 23.5 degrees from vertical compared to Earth’s orbital plane around the Sun; results in the North Pole always pointing toward the North Star
- 4. The luminous star around which Earth and other planets revolve; composed mainly of hydrogen and helium
- 5. The shape of the illuminated portion of the Moon as seen by an observer, usually on Earth
- 8. A curved path followed by a satellite as it revolves around an object
- 10. When the Moon passes between Earth and the Sun, covering all or part of the Sun; occurs when the Sun, the Moon, and Earth directly line up; lasts for less than 12 minutes
- 11. An obscuring of the light from a celestial body by the passage of an object between the celestial body and the observer or between the celestial body and its source of illumination
- 12. A celestial body that revolves around a planet
Down
- 1. A celestial body consisting of a mass of gas held together by its own gravity in which the energy is generated by nuclear reactions in its interior
- 3. When the full moon passes into Earth’s shadow, causing the Moon to appear reddish in color when the Sun, Earth, and the Moon directly line up
- 4. A star and the group of planets and other celestial bodies that are held by its gravitational attraction and revolve around it
- 6. The imaginary line through Earth that extends from the North Pole to the South Pole and is the center of Earth’s rotation
- 7. A phenomenon or process that involves multiple steps and repeats itself
- 9. The four natural divisions of the year based on changes in temperature due to varying amounts of sunlight received