The Shape and Topology of the Universe

Details The Shape and Topology of the Universe The Shape and Topology of the Universe

2008-02-15

arxiv.org/abs/0802.2236v1

Astronomy and Astrophysics

Astrophysics

21 pages, 11 figures. Proceedings of conference "Tessellations : The world a jigsaw", Leyden (Netherlands), march 2006

Scientific paper

What is the shape of the Universe? Is it curved or flat, finite or infinite ? Is space "wrapped around" to create ghost images of faraway cosmic sources? We review how tessellations allow to build multiply-connected 3D Riemannian spaces useful for cosmology. We discuss more particularly the proposal of a finite, positively curved, dodecahedral space for explaining some puzzling features of the cosmic microwave background radiation, as revealed by the 2003-2006 WMAP data releases.

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