SPACE
THE UNIVERSE MAY REVOLVE ONCE EVERY 500 BILLION YEARS
WORDS ELANA SPIVACK
The expansion rate of the universe seems to differ depending on what objects you use to measure it
In 1929, Edwin Hubble published a paper demonstrating that the universe is expanding. It gave rise to the Hubble constant, the number that describes how fast the universe is expanding. But it eventually created a puzzle, called Hubble tension, as this cosmic expansion differs depending on what cosmic objects are used to measure it. A new model could resolve this by assuming the universe rotates.