Solar System

2. The point in Earth's orbit where it is closest to the sun.
4. Laws Three mathematical laws that describe the motion of planets around the Sun (e.g., planets move in ellipses, and they sweep out equal areas in equal times).
7. The center of mass of two or more bodies that orbit each other.
8. Sun. One complete revolution takes about 365.25 days
9. A small, periodic "nodding" or swaying motion in the axis of rotation of a largely axially symmetric object, like Earth, caused by the Moon's gravitational pull.
10. two moments in the year when the sun is directly above the equator.
12. 24 hours.
13. Either of the two times a year when the sun reaches its highest or lowest point in the sky at noon.
14. The curved, elliptical path Earth follows as it travels around the sun due to gravitational pull.

1. The slow "wobble" of earths axis over a 26,000 year cycle.
3. a measure of how much orbit deviates from a perfect circle
5. The spinning of Earth on its internal axi
6. The movement of Earth in its orbit around
9. Law of universal gravitation The law stating that every mass attracts every other mass with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
11. The point in Earth's orbit where its farthest from the sun
12. Tilt The angle between Earth's rotational axis and orbital plane