Citation? Are you saying your original post was a quote without citation? That is plagiarism.
Oh good grief, do you work for that batty leftie chick up in Alaska who's always after Sarah Palin or something, lol?
*Sigh.* You're very persistent in getting others to do your homework for you.
Here:
The struggle, so violent in the early days of science, between the views of Ptolemy and Copernicus would then be quite meaningless. Either CS could be used with equal justification. The two sentences, 'the sun is at rest and the earth moves,' or 'the sun moves and the earth is at rest,' would simply mean two different conventions concerning two different CS.
- Albert A. Einstein, The Evolution of Physics, Einstein and Infeld, p. 212 (p .248 in the original 1938 edition.)
Note: CS = coordinate system