Understanding blueshift helps us learn about the universeβs expansion! π
When we see blueshift and
redshift together, it tells us that some galaxies are coming closer, while others are moving away. This balance shows that the universe is always expanding, like a balloon blowing up! π
Scientists think that if the universe keeps expanding, galaxies may drift apart, and eventually, we might be left with only a few close stars. Itβs like a cosmic race track, with galaxies zooming either towards or away from Earth!