Difference between revisions
hubble-tension
Status and infobox
- status:
—→ open - kind:
—→ problem - year:
—→ 2016 - statement:
—→ Why do early-universe and late-universe measurements of the expansion rate disagree?
Source +19 −0
+---
+title: The Hubble tension
+kind: problem
+status: open
+year: 2016
+statement: Why do early-universe and late-universe measurements of the expansion rate disagree?
+space: dark-sector
+---
+The cosmic microwave background implies about 67 km/s/Mpc, while the Cepheid–supernova distance ladder gives about 73, a gap well beyond quoted errors. Either one method has an unrecognized systematic error or the standard cosmological model is missing something. JWST measurements have not yet settled which.
+
+## What would settle it
+
+Independent measurements that converge, or a model that fits both
+
+## Sources
+
+- [Wikipedia: Hubble's law](https://en.wikipedia.org/wiki/Hubble%27s_law)
+
+[[Space:dark-sector|The dark sector]] · [[Continent:cosmos|Cosmos]]
Revision 101 as rendered
The cosmic microwave background implies about 67 km/s/Mpc, while the Cepheid–supernova distance ladder gives about 73, a gap well beyond quoted errors. Either one method has an unrecognized systematic error or the standard cosmological model is missing something. JWST measurements have not yet settled which.
What would settle it
Independent measurements that converge, or a model that fits both