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Basics of Astronomy28 chapters | 325 lessons

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Using mathematics, Johannes Kepler was able to calculate the orbit of Mars over 500 years ago. You can too, using Kepler's three laws of planetary motion. This lesson covers Kepler's history and Kepler's laws of planetary motion.

In these assessments you'll be tested on key historical facts about Johannes Kepler and his three laws of planetary motion:

- The orbital period of a planet if the planet's average distance from the sun is 10 AU
- The planet's distance from the sun if a planet's orbital period is 10 years
- Kepler's Second Law Of Planetary Motion
- The term that is defined as the time it takes a planet to travel around the sun one time
- The term that is defined as a curve surrounding two points called foci

**Distinguishing differences**- compare and contrast topics from the lesson, such as Kepler's First Law of Planetary Motion and Kepler's Second Law of Planetary Motion**Defining key concepts**- ensure that you can accurately define main phrases, such as ellipse and orbital period**Interpreting information**- verify that you can read information regarding Kepler's Second Law of Planetary motion and the speed of an orbiting planet in its orbit and interpret it correctly

To learn more about Kepler and his laws of planetary motion, review the accompanying lesson Kepler's Three Laws of Planetary Motion. This lesson covers the following objectives:

- Know who Johannes Kepler was and explain his background
- Define ellipse and explain the components of an ellipse
- Understand how Kepler's Second Law of Planetary motion explains the variable speeds of planets in their orbits
- Define orbital period and know how to solve the orbital period for a planet that orbits 5.2 AU from the sun

Final Exam

Chapter Exam

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Basics of Astronomy28 chapters | 325 lessons

- Go to Telescopes

- The Scientific Field of Astronomy 5:52
- The Ancient Study of Astronomy 4:30
- The Constellations: Definition & Name Origins 4:58
- What is Astrology? 7:25
- The Zodiac Constellations & Their Visibility in the Sky 4:06
- Telling Time in Ancient Times 6:41
- The Lunar Calendar & Metonic Cycle 4:17
- The Connection Between the Seven Days of the Week & Astronomical Objects 4:14
- Geocentric, Heliocentric & Ptolemaic Models of the Universe 6:23
- The Copernican Revolution 5:43
- Tycho Brahe's Contribution to Astronomy 5:34
- Kepler's Three Laws of Planetary Motion 6:43
- Sir Isaac Newton And Astronomy 7:13
- Origins of the Julian & Gregorian Calendars 5:58
- Go to The History of Astronomy

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