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Newbie lives on a mountain, grasshopper.
Originally posted by weedwhacker
reply to post by Just Wondering
To sit in a room, gazing out a window, using a favorite tree as a reference point doesn't account for differences in the positioning of the observor, year after year. you may think your favorite easy chair hasn't budged in twelve months, but...really? Certain?
A difference of only a few inches will amount to a great deal of parallax in what you observe, and perceive. These are pretty basic understandings, and aren't hard to research.