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Cosmology

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Brief Answers to Cosmic Questions. Structure of the Universe Does the Universe have an edge, beyond which there is nothing?

Brief Answers to Cosmic Questions

Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? Does the term "universe" refer to space, or to the matter in it, or to both? Evolution of the Universe Did the Universe expand from a point? If so, doesn't the universe have to have an edge? S Simple Satellite Tracker: International Space Station, spy satellites, Hubble Space Telescope. Brief Answers to Cosmic Questions.