In an era defined by extreme geopolitical volatility, where our future as a global society feels more unpredictable than ever, it is all too easy to forget just how little we actually know about ...

Flummoxed by this finding, Einstein assumed there was a flaw in his equations and introduced a "cosmological constant" which allowed for a universe that didn't change size. When Edwin Hubble ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

The universe is expanding. This was the great revelation of the 20th century, thanks to astronomer Edwin Hubble, whose work ...

Dark matter, dark energy, the Hubble tension: underpinning these theories is Einstein’s general theory of relativity, which treats space and time as a unified “spacetime” and considers ...