Earth, Sun and Moon

2. 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.
4. The luminous star around which Earth and
5. Any of the varying appearances of the Moon as seen from Earth as different amounts of the lunar disk are illuminated by the Sun.
6. The imaginary line through Earth from the North Pole to the South Pole.
8. planets revolve.
9. 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.

1. The slant of earth's axis (23.5*).
2. The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
3. A celestial body that revolves around a planet.
4. The four natural divisions of the year based on changes in temperature.
7. A curved path followed by a satellite as it revolves around an object