Wednesday, March 24, 2021

Creation Moment 3/25/2021 - Big Bang in "Crises", opinions & need to be "Fixed"

He that sitteth in the heavens shall laugh... Psalm 2:4

"Calculations based on observations of the early universe — namely, the cosmic microwave background (CMB) that is a sort of afterglow of the Big Bang — produce one answer for the Hubble constant. 
Observations of the “late universe” instead compare the distances of astronomical objects, often standard candles with known distances, to the speed those objects are moving away from us. The two
techniques provide different answers, a discrepancy that has become known as the Hubble-constant tension
.
 
Two independent groups using data from the Hubble Telescope have just published new studies measuring the Hubble constant in different ways, ....The results give further credence to the late-universe consensus of an expansion rate around ~73 km/s/Mpc
But it also serves to deepen the tension, as studies published in the last decade calculating the rate from the properties of the CMB give an answer around ~67 km/s/Mpc. This may seem like no big deal, but the difference is big enough that some astrophysicists are calling it a “crisis for cosmology.”
 
 “Cosmic microwave background radiation doesn't give a direct measurement of the Hubble constant today,” Blakeslee says. “It needs to be combined with a cosmological model, which can then predict the expansion history of the universe.” And it’s possible that something vital has been “lost in translation.
 
Hsin-Yu Chen (MIT), a member of the LIGO collaboration, and the author of a few studies pioneering the use of gravitational waves to measure the current expansion rate, says that everyone disagrees about the nature of the disagreement between early and late universe measurements.

“Perhaps the discrepancy is from systematic errors,” she says. Or maybe the standard cosmological model needs to be fixed. Maybe it is wrong. Everyone has their own opinion. Sky&Telescope