n a 2013 observational study of the large-scale structure of the universe, University of Wisconsin-Madison astronomers Amy Barger and Ryan Keenan showed that our galaxy, in the context of the large-scale structure of the universe, resides in an enormous void—a region of space containing far fewer galaxies, stars and planets than expected. The structure of the cosmos is Swiss cheese-like in the sense that it is composed of “normal matter” in the form of voids and filaments.
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