In more shoot-the-wounded news: a longstanding cosmological contradiction is now solved.
The Hubble Constant - the rate of expansion - relies on two precise calculations. One is the cosmic microwave background. The other is a witness of distant supernovae, which are older, against nearby ones which blew more recently. The background yields 67.4 in kms-1 / Mpc; the supernovae, 74. The precision has improved for each - opening up a statistical gap in between.
Lucas Lombriser points out that our closer galaxies roam this universe in a cluster. Those more-recent and closer supernovae, then, are no statistical sample of the universe at large. Therefore, says Lombriser, that measurement should be discarded for the Hubble calculation. Supernovae can be repurposed for finetuning the properties of our galactic cluster.
The space for NuPhysics shrinks again.
OH DEAR 6/2: Another measurement, 10.1103/PhysRevLett.124.221301. 72.3 +/- 1.9 km s−1 Mpc−1.
BACK ON TARGET 7/15: 67.6, from the Atacama in Chile's ACT.
SIGH 7/27: 75, ruling out all under-70s at 95%. Make up your minds!
MEASURMENT 10/29: What's the expansion rate?
ATACAMA AGAIN 1/4/21: 13.77 billion years. Cornell found what Stony Brook found 7/15.
DONE 5/20/21: Variable over time. Let this be the last appendix.
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