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A childhood belief about physics

I teach 8th grade. Many of my students have been amazed to learn recently that our Galaxy is called the Milky Way, that this isn't the only galaxy, that our sun is not at the center of our galaxy, and that no people or even space probes have left our galaxy. I especially love to watch their faces when I show them a picture of the Hubble Deep Field North and say that every point of light in the picture is a galaxy, then explain just how small an amount of the sky that the picture covers.

— Shelly

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