Read pages: Explain each of Kepler’s 3 laws of planetary motion. 2. What is eccentricity and orbital period? 3. How did Newton’s ideas about the orbits of the planets differ from Kepler’s ideas. True/False 4. A planet moves relatively slower when it is farther from the sun than it does when it is closer to the sun. 5. Kepler’s first law states that each planet orbits the sun, not in a circle, but in an ellipse. 6. Kepler’s third law states that the square of the average distance of a planet from the sun is proportional to the cube of the orbital period. If you finish early: Read the “Reading Skills” section on page 712 and answer questions.

Read pages: Explain each of Kepler’s 3 laws of planetary motion. scientists use a planet’s orbital period to determine how far away a planet is from the sun

Read pages: What is eccentricity and orbital period?

Read pages: How did Newton’s ideas about the orbits of the planets differ from Kepler’s ideas.

Read pages: True/False 4. A planet moves relatively slower when it is farther from the sun than it does when it is closer to the sun. 5. Kepler’s first law states that each planet orbits the sun, not in a circle, but in an ellipse. 6. Kepler’s third law states that the square of the average distance of a planet from the sun is proportional to the cube of the orbital period.

Read pages: If you finish early: Read the “Reading Skills” section on page 712 and answer questions. 8 – C 9 – F 10 – how all the stars move together AND how the whole sky spins slowly as the night goes on