What is the 'Hubble Tension' currently facing cosmologists?
Answer
The discrepancy between $H_0$ measurements derived from nearby standard candles versus those derived from the early universe via the CMB.
The Hubble Tension is the noted disagreement where measurements of the Hubble constant ($H_0$) based on local observations (like supernovae, around $73 ext{ (km/s)/Mpc}$) yield a slightly higher value than measurements derived from the early universe using the CMB (around $67.4 ext{ (km/s)/Mpc}$).
#Videos
The Expansion of the Universe Made Simple - YouTube
Related Questions
What is the core physical description of the expansion of the universe?What critical observation did astronomer Vesto Slipher first notice regarding light from remote galaxies?According to Hubble's Law, what is the relationship between a galaxy's distance and its apparent recession velocity?In the raisin bread analogy used to describe cosmic expansion, what do the raisins represent?Why do structures like solar systems and galaxies not expand along with the universe?What is the ultimate implication of the universe expanding into a space that is constantly being created?What mysterious repulsive pressure, discovered through 1998 supernova observations, is causing the current acceleration of cosmic expansion?What percentage of the universe's total mass-energy content is currently attributed to Dark Energy?What is the major theoretical hurdle associated with the Cosmological Constant ($\Lambda$) hypothesis for Dark Energy?What is the 'Hubble Tension' currently facing cosmologists?