Why cosmology is more than a theory

Edwin Hubble found that distant galaxies travel away from Earth faster than nearer ones. Credit: New York Public Library/SPL Universe: A Guide to Everything Helge Kragh Reaktion (2026) What is the Universe? Should we think of it as a thing or a set of ideas? Acclaimed historian of science Helge Kragh grapples with such deep questions in his latest work, which he acknowledges is “a small book about a big subject”. Universe is a distillation of Kragh’s many writings on the history of cosmology. …