New data fuel debate on universe’s expansion rate
Quasar observations support higher value for Hubble constant
By
Emily Conover
4:38pm, February 2, 2017
A new estimate of how fast the universe is expanding supports one side of an ongoing debate, favoring a more rapid expansion.
Observations of type 1a supernovas imply a faster expansion rate (known as the Hubble constant) than studies of the cosmic microwave background — light that originated early in cosmic history (SN: 8/6/2016, p. 10). Scientists with the H0LiCOW collaboration have now weighed in, using quasars, ultrabright light sources stirred up by supermassive black holes.
https://www.sciencenews.org/article/new-data-fuel-debate-universes-expansion-rate?mode=topic&context=36
