Across
- 2. Type of month measured from new moon to new moon
- 4. an apparent or real oscillation of the moon, by which parts near the edge of the disc that are often not visible from the earth sometimes come into view
- 6. the speed at which an object (usually a planet) orbits around the mass of another object; in the case of a planet, the speed at which each planet moves along its ellipse
- 7. the straight line joining a planet and the Sun sweeps out equal areas in space in equal intervals of time
- 8. the path of an object that is in revolution about another object or point
- 9. Fixed point inside an ellipse from which the sum of the distances to any point on the ellipse is constant. The sun is found at one of these
- 13. the square of a planet’s orbital period is directly proportional to the cube of the semimajor axis of its orbit
- 14. The distance from the sun to the earth
- 15. Moon phase where the only the right half of the moon is lit
Down
- 1. Moon phase immediately after a full moon where a crescent of darkness is seen on the moon's right side
- 3. the time it takes an object to travel once around the Sun
- 5. each planet moves around the Sun in an orbit that is an ellipse, with the Sun at one focus of the ellipse
- 10. Type of month measured with respect to the stars
- 11. Moon phases when the moon is between the Earth and Sun and we see the dark backside of the moon
- 12. A flattened circle - also the shape in which planets orbit the sun