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Articles on Cosmological constant

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Fosalba & Gaztañaga 2021, MNRAS

Cosmological models are built on a simple, century-old idea – but new observations demand a radical rethink

New deep-space discoveries suggest the Universe is lumpy and lopsided. But if matter is distributed unevenly, we’ll have to rethink the simple geometry used in cosmological models.
Understanding how galaxies are arranged could be the key to figuring what causes the expansion of the universe. ESA/Hubble, NASA and S. Smartt (Queen's University Belfast)

Galaxy survey to probe why the universe is accelerating

A unique map of the galaxies in the sky could shed light on the mysteries of the universe – including dark energy and dark matter.
How do we think about something we can’t see and don’t experience in our everyday lives, but seems to be pushing our universe apart ever faster? NASA, ESA, G. Illingworth, D. Magee, and P. Oesch (University of California, Santa Cruz), R. Bouwens (Leiden University), and the HUDF09 Team

Explainer: the mysterious dark energy that speeds the universe’s rate of expansion

Einstein’s theory of gravity says dark energy must be out there, accelerating the expansion of our universe. But what is it and how can we try to figure out more about it?

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