Keplar's Laws

2. One of two special points inside an ellipse; the Sun sits at one focus in a planet’s orbit.
7. An oval shape; the path planets follow around the Sun.
8. An object’s resistance to changing how it’s moving; it helps planets stay in orbit by balancing gravity.
11. The pull between two objects with mass; stronger when masses are bigger and distance is smaller.
12. The path an object takes as it moves around a star, planet, or moon.
13. The amount of matter in an object; more mass means more gravitational pull.
14. The average distance from Earth to the Sun; used to measure distances in space.
15. Every object pulls on every other object, and the strength depends on their masses and the distance between them.
16. Planets move faster when they are closer to the Sun and slower when farther away.

1. How far apart two objects are; gravity gets weaker as distance increases.
3. The time it takes for an object to complete one full trip around another object.
4. is the plural form of focus
5. Half of the longest distance across an ellipse; shows a planet’s average distance from the Sun.
6. The time a planet takes to orbit the Sun depends on how far away it is.
9. Planets move in oval-shaped orbits with the Sun at one focus.
10. A force that keeps objects moving in a circle by pulling them toward the center (gravity acts as this force in space).