Astronomers have assumed for decades that the Universe is expanding at the same rate in all directions. A new study based on data from ESA’s XMM-Newton, NASA’s Chandra and the German-led ROSAT X-ray ...

One of the basic assumptions of cosmology is that the Universe is basically the same everywhere. That is, our location in the cosmos isn't special, and if we happened to be located in another corner ...

“The cosmological principle is like an ultimate kind of statement of humility,” explains James Adam, astrophysicist at the University of the Western Cape, Cape Town, South Africa, and lead author of ...

One of the core components of cosmology is the understanding that the universe is expanding evenly in all directions. It was predicted by theory decades ago, and supported by measurements of the ...

Researchers at Harvard and the University of Bonn published a study April 7 casting possible doubt upon the longstanding assumption that the universe is isotropic. Isotropy is the principle that the ...

Let $\operatorname{aut}(X)$ be the group of homotopy classes of self-homotopy equivalences of a space X and let [ f] ∈ ] X, Y] be a homotopy class of maps from X to Y. The aim of this paper is to ...