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Quantum gravity

An astrophysical constraint

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A quantum theory of gravity is proving elusive. Observations of radiation from the Crab nebula now place even stronger constraints on the likelihood of detecting the effects of quantum gravity.

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Figure 1: The Crab nebula. Located in the constellation of Taurus, this cloud of gas is all that remains of a star whose explosion in ad 1054 was recorded by Chinese astronomers.

NASA/CXC/HST/ASU/J. HESTER ET AL.

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  1. Enrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, 60637, Illinois, USA

    Sean Carroll

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  1. Sean Carroll
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Correspondence to Sean Carroll.

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Carroll, S. An astrophysical constraint. Nature 424, 1007–1008 (2003). https://doi.org/10.1038/4241007a

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