Eccentricity.

Slides:



Advertisements
Similar presentations
Eccentricity is the ratio of the distance between the foci and the length of the major axis of an ellipse.
Advertisements

Chapter 27.2 Models of the solar system
Motions of the Planets This presentation will introduce these terms: Geocentric, Heliocentric, Retrograde, Rotation, Revolution.
Geocentric Model Earth is center of our Solar System
Models of the Solar System *Early Models of the Solar System *Kepler’s Laws.
Models of the Solar System
Planets of the Solar System Section 2 Section 2: Models of the Solar System Preview Key Ideas Early Models Kepler’s Laws Newton’s Explanation of Kepler’s.
The Solar System Planetary Orbits
What do you notice about the Orbit of the Planet’s compared to the Comet’s?
Opening for today… Kepler’s Laws of Planetary Motion Objective: Students will explain planetary motion using gravitational laws.
Planetary Orbits The ancient Greeks (Aristotle and Plato) thought the only perfect shapes were the circle and line. All things fall in a line toward Earth,
Solar System Overview. Early Ideas  It was assumed that the Sun, planets, and stars orbited a stationary universe  This is known as a “geocentric” model,
The law of orbits:  All planets move in elliptical orbits, with the sun at one focus.
9.1.2 – Applications of Ellipses, Other Information.
Johannas Kepler Johannas Kepler Planetary Orbital Laws Planetary Orbital Laws.
EARTH & SPACE SCIENCE Chapter 27 Planets of the Solar System 27.2 Models of the Solar System.
What is rotation? Spinning on an imaginary axis Period of rotation is the time it takes for a planet to make 1 spin on its axis =length of a planet day.
2.1 Do Now Take 15 minutes to complete the do now. Make sure to write your name, date, and 2.1 on top of your paper. Read the Article “New Planet Discovered.
AIM: What is Astronomy? Do Now: Answer the following question in your notebook. Where is the sun in our solar system? What percent of our Solar System’s.
Learning Log Write about how you think the Earth moves in relation to our Universe and solar system.
Daily Science Pg.30 Write a formula for finding eccentricity. Assign each measurement a variable letter. If two focus points are 450 km away from one another.
Ellipses. Ellipse An ellipse is a closed curve around two fixed points called foci. Earth, and all the planets, revolve around (orbit) the sun in an eccentric,
Kepler’s Laws of Planetary Motion © David Hoult 2009.
Kepler’s Law Eric Angat teacher. Orbit Eccentricity The eccentricity of an ellipse can be defined.
The planets 12/1/14.
(1) 150 million kilometers (2) 228 million kilometers
Geometry of Earth’s Orbit Kepler’s Laws of Planetary Motion.
Laws of Planetary Motion KEPLER & NEWTON. Kepler’s 3 Laws  1 st Law- Law of Ellipses  2 nd Law- Law of Equal Areas  3 rd Law- Law of Periods.
Historical Models of our Solar System and Kepler’s Laws of Planetary Motion.
Eccentricity. Definition Degree of ovalness of an orbit around the sun.
EARTH & SPACE SCIENCE Chapter 27 Planets of the Solar System 27.2 Models of the Solar System.
The Universe. A Celestial Object is any object in our universe above our atmosphere. A Celestial Object is any object in our universe above our atmosphere.
CHAPTER 27 SECTION 2 EARTH AND SPACE AUSTIN HIGH SCHOOL Models of the Solar System.
Eccentricity.
T HE G EOMETRY OF P LANETARY O RBITS How do we define the path that planets take as they revolve around the Sun?
1.1.1c.  Through observations, Newton realized that any two bodies attract each other with a force that depends on their masses and the distance between.
 Compare the models of the universe developed by Ptolemy and Copernicus.  Summarize Kepler’s three laws of planetary motion.  Describe how Newton explained.
Aristotle suggested an Earth-centered, or geocentric, model of the solar system. In this model, the sun, the stars, an the planets revolved around Earth.
Orbits, Asteroids, and Comets. The Geometry of Orbits Planets revolve in an ellipse around the sun –An ellipse has two fixed points called foci that are.
Our Solar System.
Aim: How do we calculate the eccentricity of an ellipse?
Warmup Why is “space” called “space”? How did our solar system form?
Kepler’s laws of planetary motion
Kepler’s Laws of Planetary Motion
Our Solar System ©Mark Place,
MODELS OF THE SOLAR SYSTEM
Our Solar System PAGE 16.
Science Starter Kepler’s 1st law states that planetary orbits are _________________ shapes? Kepler’s 2nd law states that 2 equal intervals of time an imaginary.
L. O: swbat calculate the elliptical orbits of planets
Section 2: Models of the Solar System
Solar System Overview.
Our Solar System ©Mark Place,
Models of the Solar System
The Movements of the Earth and its Effects
Do Now We will be starting with a Kepler’s Law Review today
Physics of the Solar System
Our Solar System ©Mark Place,
Section 2: Models of the Solar System
The sun makes up about 99% of our solar systems mass.
Earth’s Role as a Body in Space
The sun makes up about 99% of our solar systems mass.
Lesson 2 Models of the Universe
Kepler’s Laws of Planetary Motion
Aim: How can we explain the laws that control the planets orbits?
Our Solar System ©Mark Place,
Aim: How do planets move?
Kepler’s Laws EARTH SCIENCE
8.8 Kepler’s Laws Unit 8: Astronomy May 16, 2012 Sanders.
Eccentricity.
Kepler’s Laws of Planetary Motion
Presentation transcript:

Eccentricity

An Ellipse is an oval shaped orbit. What is an Ellipse? An Ellipse is an oval shaped orbit.

Within the ellipse are two fixed points called foci. For the planets in our Solar System the Sun is one of these foci.

The degree of flattening or “ovalness” of an ellipse. What is eccentricity? The degree of flattening or “ovalness” of an ellipse.

Where can we find the formula?

Ellipses (cont.) If e=0, the ellipse is a circle. If e=1, the ellipse is a line. As distance between foci increases, eccentricity increases. This is a _______ relationship. The Sun is a foci in our Solar System.

How do we find eccentricity? Measure the distance between the two foci. Divide by the length of the major axis.

1. Which planet has the least distance between two foci of its elliptical orbit? Venus Earth Mars Jupiter

2. Which bar graph correctly shows the orbital eccentricity of the planets in our solar system?

3. The diagram below shows the elliptical orbit of a planet revolving around a star. The star and F2 are the foci of this ellipse. What is the approximate eccentricity of this ellipse? 0.22 0.47 0.68 1.47

Regents Questions

Free Write: What you know about eccentricity of ellipses? Take out a piece of loose leaf and fold it in half. Write your response on one half. You may use the diagram, your notes, and the E.S.R.T. to help you write your details. Keep writing until time is announced to stop

Free Write: How did Kepler’s Laws of Planetary Motion help to explain and refine our knowledge of the planets’ revolution around the Sun? Write your response on the unused half of paper. You may use the diagram and the E.S.R.T. to help you write your details. This is an individual task Keep writing until time is announced to stop

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.