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Youe can not help men permanently by doing for them what they could and should do for themselves. ..."Abraham Lincoln(1809-1865, US President 1861-1865"

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 Author Topic: Earth Sun And Moon  (Read 6266 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Fu-Kwun Hwang
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 « Embed this message on: June 13, 2010, 01:44:14 pm » posted from:Taipei,T\'ai-pei,Taiwan

Earth, Sun  and Moon
A particular case of the three-body problem, this is a simulation of three bodies interacting according to the universal gravitational law.
We have taken the data for the Sun, the Earth and the Moon in order to make it more attractive. The difficult part is to set up initial conditions so that the Moon is captured by the Earth in its translation orbit around the Sun.
In the initialization page, we approximate the real initial position for the Sun, the Earth and the Moon, which produces the situation we are familiar with.

Activities

1. As an exercise for your students, delete the initialization page (the one with the real situation of the Sun, Earth and Moon) and ask your students to try to reproduce it!
2. Another interesting activity is to pause the simulation, drag the Sun to a different position and play the simulation again to see how this causes the Moon to scape the trajectory.
3. Now that we dragged a body, why not dragging any of the other ones? (Please recall to pause the simulation before dragging any of the bodies, otherwise the simulation may become unstable)
Author : Francisco Esquembre

Date : February 2002

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Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
• Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
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Youe can not help men permanently by doing for them what they could and should do for themselves. ..."Abraham Lincoln(1809-1865, US President 1861-1865"