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Research article
Research articleWhat do we really know about dark energy?
Published:28 December 2011https://doi.org/10.1098/rsta.2011.0285
Abstract
In this paper, we discuss what we truly know about dark energy. I shall argue that, to date, our single indication for the existence of dark energy comes from distance measurements and their relation to redshift. Supernovae, cosmic microwave background anisotropies and observations of baryon acoustic oscillations simply tell us that the observed distance to a given redshift z is larger than the one expected from a Friedmann–Lemaître universe with matter only and the locally measured Hubble parameter.
Footnotes
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