In Edwin E. Slosson's "Easy Lessons in Einstein," Section 6 titled "The Egocentric Theory of the Universe" likely deals with a discussion of the shift from the traditional geocentric (Earth-centered) and heliocentric (Sun-centered) views of the universe to a more modern perspective influenced by Einstein's theories, where observations are understood as relative to the observer's frame of reference. This section would explore how Einstein’s theories challenge the notion that there is a "center" of the universe in the conventional sense, emphasizing the idea that all motion and positioning are relative.

Potential Content of "The Egocentric Theory of the Universe"

Here's a generalized outline of what Section 6 might cover:

1. Historical Context : Slosson could begin by outlining the historical shift from the ancient geocentric views of the universe to the heliocentric model proposed by Copernicus. This would set the stage for discussing how Einstein's theory further revolutionizes our understanding of the universe's structure.

2. Relativity of Observations : This section would likely delve into how, according to Einstein’s theory of relativity, all motion is relative. This means that each observer could theoretically consider themselves as the center from which measurements are made, hence the term "egocentric theory." Slosson might use examples to illustrate how different observers, moving relative to each other, would see the same events in markedly different ways (e.g., the relativity of simultaneity).

3. Implications for Cosmology : Discussing the implications of Einstein’s theories on cosmology, Slosson might explore how the concept of a dynamic and possibly infinite universe fits into the framework where there is no absolute center. This section could discuss how modern cosmology views the universe as expanding, with galaxies moving away from each other, and how this expansion supports the idea that no particular point can truly be considered the center of the universe.

4. Philosophical Reflections : Slosson could conclude this section with philosophical musings on the implications of losing a central point of reference. This might involve a discussion on how this impacts our understanding of our place in the universe and the way we perceive the world around us.

By explaining these complex ideas in a simplified and engaging manner, Slosson’s "The Egocentric Theory of the Universe" would help readers appreciate the profound shifts in perception brought about by Einstein's theories, encouraging a more nuanced understanding of our universe and our place within it.