Across
- 1. An obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.
- 4. 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.
- 5. The four natural divisions of the year based on changes in temperature.
- 7. The Slant of Earth's axis (23.5*).
- 8. A celestial body that revolves around a planet.
Down
- 2. Any of the varying appearances of the Moon as seen from Earth as different amounts of the lunar disk are illuminated by the Sun.
- 3. A curved path followed by a satellite as it revolves around an object.
- 4. The luminous star around which Earth and the other planets revolve.
- 5. The collection of eight planets and their moons in orbit around the sun.
- 6. The imaginary line through Earth from the North Pole to the South Pole.