About This Chapter
Orbits & Gravity - Chapter Summary
Use the lessons in this chapter to examine orbits and the factors that determine their shape. Our instructors will discuss elliptical orbits and provide an in-depth look at their periods and speeds. Eccentricity in orbits is another topic you'll explore. There is also a lesson on the kinds of trajectories celestial objects follow. After watching these lessons, you'll know more about:
- Periods and speeds of elliptical orbits
- The influence of energy and gravity on orbits
- Kepler's Laws
- The four kinds of trajectories for celestial objects
You can watch these lessons at your convenience, on a computer, smartphone or tablet. Every lesson is accompanied by a written transcript so you can read along with the narrator. A quiz at the end of each lesson allows you to test your knowledge and see where you need extra study.
1. Elliptical Orbits: Periods & Speeds
After watching this lesson, you will be able to explain what an elliptical orbit is and calculate the period and speed of an object in an elliptical orbit, if given enough information. A short quiz will follow.
2. How Orbits Are Influenced by Gravity & Energy
This lesson will explain how potential energy, kinetic energy, speed, and gravity are linked to the orbital motion of planets in our solar system. It will also define aphelion and perihelion.
3. Kepler's Laws, Ellipses, and Eccentricity
This lesson will discuss Kepler's First Law of Planetary Motion; define an ellipse, focus, major axis, semimajor axis, and eccentricity; and explain what they have to do with astronomy.
4. The Four Kinds of Trajectories for Celestial Objects
What does the slicing apart of a cone and the resultant shapes have to do with trajectories and escape velocity? This lesson will tell you as it goes over ellipses, circles, hyperbolas, and parabolas.
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Other chapters within the NES Earth & Space Science - WEST (307): Practice & Study Guide course
- The Scientific Revolution & Society
- Scientific Research & Experiments
- Laboratory Equipment, Solutions & Measurements
- Using Mathematics in Science
- Reading & Constructing Maps
- Cycles and Spheres of Earth
- Rocks & Minerals
- Earth's Internal Structure
- The Lithosphere
- Understanding Earthquakes
- Weathering, Erosion & Soil
- Geologic Time & Relative Dating
- Natural Resources & Energy
- Earth's Water Balance
- Oceans & Tides
- Ground Water Systems
- Flowing Water
- Water Resource Issues
- Atmospheric Cycle & Solar Energy
- Earth's Climate Systems
- Air Masses & Wind
- Severe Weather & Disturbances
- Weather Forecasting & Analysis
- Atmospheric Changes
- Formation & Phases of the Moon
- The Sun's Structure, Energy & Life Cycle
- Solar Radiation, Energy & Light
- Formation of the Solar System
- Solar System Components & Characteristics
- The Laws of Kepler & Newton
- Star Types & Life Cycle
- Stars, Energy & Spectra
- Cosmological Theories of the Universe
- Space Science Technology
- NES/WEST Earth & Space Science Flashcards