August 18, 2022

It’s official – we don’t know how fast the universe is expanding

It’s official – we don’t know how fast the universe is expanding
It’s official – we don’t know how fast the universe is expandingIt’s official – we don’t know how fast the universe is expanding

The Hubble constant describes how fast the universe is expanding, but our measurements won’t line up, which may mean our standard model of the universe is wrong

Space 20 January 2022

Images taken by the Hubble Space Telescope of galaxies looked at in the study

ESA

The expansion of the universe is accelerating, but we don’t know how fast. With new observations, this issue has only got more severe, and now some astronomers are saying that it’s officially a real problem – not one caused by uncertainties in the measurements.

There are two main ways that we measure the the Hubble constant, which describes the expansion of the universe. The first is to examine the cosmic microwave background (CMB) – a …