Astronomers Find Universe Expanding Faster Than Predicted
Astronomers Find Universe Expanding Faster Than Predicted
For nearly a century, astronomers have known that our universe is expanding.
However, a major debate has recently emerged among scientists called the "Hubble tension."
This term refers to a persistent disagreement regarding the speed of this expansion, known as the Hubble constant.
Scientists using two different methods have calculated conflicting results.
Observations of the early universe, based on the Cosmic Microwave Background, suggest an expansion rate of about 67–68 km/s/Mpc.
Conversely, measurements of the local universe using "standard candles" like distant supernovae suggest a faster rate of 73–74 km/s/Mpc.
Because these measurements have become increasingly precise, experts believe the gap is not simply a measurement error.
The discrepancy could point toward new physics, such as unknown subatomic particles or previously misunderstood effects of dark energy.
