Physics-Orbital Motion

2. a bright object in the night sky made up of bright plasma
3. the force that attracts a body towards another body
6. the curved path of a celestial object
7. the motion of one object around another
8. a quantity having both direction and magnitude.
10. strength or energy as an attribute of physical action or movement
11. a collection of matter that can be considered a singular unit for scientific studies
14. the interval of time between successive occurrences of the same state in an oscillatory or cyclic phenomenon, such as a mechanical vibration, an alternating current, a variable star, or an electromagnetic wave.
15. the average distance between the earth and the sun
16. a celestial body moving around a star
17. Oval shape,sum of its distances from two other points (the foci) is constant,
18. the force acting on an object moving in a circular path towards the middle of the point the object is moving around
19. deviation of a curve or orbital from circularity
20. distance from object to the object its orbiting

1. each planet's orbit about the Sun is an ellipse
4. the squares of the orbital periods of the planets are directly proportional to the cubes of the semi-major axes of their orbits.
5. the points on the ellipse of a planets orbit
9. the imaginary line joining a planet and the Sun sweeps equal areas of space during equal time intervals as the planet orbits.
12. the speed of something in a given direction
13. acceleration of a object in a circular path or motion