Lesson 1 models of the solar system
Download
1 / 14

Lesson 1: Models of the Solar System - PowerPoint PPT Presentation


  • 76 Views
  • Uploaded on

Lesson 1: Models of the Solar System. What Was the Geocentric Model? How Did the Heliocentric Model Develop?. What they used to think…. What Was the Geocentric Model?. Earth in the center of the universe. http://www.voki.com/pickup.php?scid=5866842&height=267&width=200. WHY!!!!!!.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Lesson 1: Models of the Solar System' - malory


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Lesson 1 models of the solar system
Lesson 1: Models of the Solar System

  • What Was the Geocentric Model?

  • How Did the Heliocentric Model Develop?



What was the geocentric model
What Was the Geocentric Model?

  • Earth in the center of the universe

http://www.voki.com/pickup.php?scid=5866842&height=267&width=200



Ancient observations
Ancient Observations

  • Pattern of the stars didn’t change over time

    • Stars seemed to move, but stayed in the same position relative to one another

    • Observed planets moving among the stars

  • Early observers thought Earth was at the center of the universe

    • (Chinese) Thought Earth was under a dome of stars

    • (Greek) Thought the Earth was inside rotating spheres nested inside each other

  • Ge is Greek for “Earth”

  • Geocentric model: Earth is at the center of the revolving planets and stars



Ptolemy s model
Ptolemy’s Model

  • (140 A.D.) Ptolemy further developed the geocentric model (Greek)

  • Planets moved in small circles carried along in bigger circles

  • Explained motions in the sky fairly accurately

  • Accepted for nearly 1,500 years


Whoops they were wrong
Whoops!They were wrong!


Heliocentric model
Heliocentric Model

  • Sun in the center


How did the heliocentric model develop
How Did the Heliocentric Model Develop?

  • Aristarchus developed a sun-centered model (Greek)

  • Helio (Greek for “sun”)

  • The Earth and other planets go around the sun

  • Not well received in ancient times


The copernican revolution
The Copernican Revolution

  • (1543) Nicolaus Copernicus worked out the arrangement of the known planets and how they move around the sun

  • More evidence was needed to convince many people



Brahe and kepler
Brahe and Kepler

  • (1500s) Tycho Brahe made more accurate observations

  • Johannes Kepler (Tycho’s assistant)

    • Figured out the shape of the planet’s orbit

    • Elliptical (or oval shaped)


Galileo s evidence
Galileo’s Evidence

  • (Italian) Galileo convinced others that the heliocentric model was correct!

  • (1610) Discovered 4 moons around Jupiter

    • Not everything in the sky revolved around Earth

  • Venus goes through phases similar to the moon

    • It would not have a full set of phases if both it and the sun circled around Earth


ad