How Fast Is the Universe Really Expanding?

Home How Fast Is the Universe Really Expanding? Comment Save Article Read Later Share Facebook Copied! Copy link Email Pocket Reddit Ycombinator Comment Comments Save Article Read Later Read Later The Joy of Why How Fast Is the Universe Really Expanding? By Steven Strogatz and Janna Levin July 23, 2026 One of the most contested issues in cosmology is our understanding of the Universe’s expansion. Adam Riess discusses why there is disagreement and what might resolve it. Comment Save Article Read Later Chanelle Nibbelink for Quanta Magazine Introduction Authors Steven Strogatz Podcast Host Janna Levin Contributing Columnist July 23, 2026 View PDF/Print Mode astronomy astrophysics cosmology dark energy dark matter fundamental physics Hubble constant physics The Joy of Why All topics One of…

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