Across
- 2. the center of mass of two or more bodies that are orbiting each other
- 7. a Renaissance mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at the center of the universe
- 9. the speed where an object has traveled to completely overcome a planet/moon's gravity and make it into space away from that planet or moon
- 10. a wave that travels at the speed of light and consists of a combined electric and magnetic effect
- 12. gravitationally curved path of an object about a point in space
- 14. three laws of mechanics describing the motion of a body made by Issac Newton
- 16. quantity of rotation of a body
- 17. a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points
Down
- 1. a darkening of the moon caused by its entering the shadow of the earth
- 3. deviation of a curve or orbit from circularity
- 4. a region around a magnetic material or a moving electric charge within which the force of magnetism acts
- 5. three laws devised by Johannes Kepler to define the mechanics of planetary motion
- 6. an Italian astronomer and mathematician who was the first to use a telescope to study the stars
- 8. a law which states that the momentum of a system is constant if there are no external forces acting on the system
- 11. the center of rotation
- 13. this person best known for his discovery that the orbits in which the Earth and the other planets of the solar system travel around the Sun are elliptical, or oval, in shape
- 15. the point in the orbit of a planet that is furthest from the sun