To astronomers in the 1990s, these three facts were self-evident: The universe is expanding; all the matter in the universe is gravitationally attracting all the other matter in the universe; ...

In this video, Arvin Ash explores the history of the universe from the Big Bang to modern cosmology. Key discoveries include: - **1920s**: Edwin Hubble discovered galaxies outside the Milky Way and ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A photograph of the Atacama Cosmology Telescope in Chile overlaid with a figure from its final ...

The Atacama Cosmology Telescope (ACT) in Chile has released its final batch of data after 15 years — and it proves that the Hubble tension, a rift in our understanding of the universe, is very real.