Daniel Scolnic used evidence from the DESI project to construct a cosmic distance ladder from the Coma cluster that confirms this discrepancy. For 10 points each:
[10h] Name this discrepancy between “late-universe” values of around 73 kilometers per second per megaparsec and “early-universe” values of 67 or 68 kilometers per second per megaparsec.
ANSWER: Hubble tension
[10m] The Hubble tension violates this model’s predictions for the Hubble parameter. This main cosmological model hypothesizes that 68% of the universe is dark energy.
ANSWER: LCDM [or Lambda-CDM; or Lambda-Cold Dark Matter; prompt on Standard Model of cosmology]
[10e] One proposed solution to the Hubble tension is that it is being caused by the sterile version of these particles. These leptons have almost no mass and no charge.
ANSWER: neutrinos [accept sterile neutrinos]
<Benjamin McAvoy-Bickford, Physics>