The article explains the apparent paradox of the universe's size versus its age by highlighting the role of cosmic expansion.Despite being only 13.8 billion years old, the observable universe spans 93 billion light-years due to the continuous expansion of space.

Light from distant galaxies has traveled for billions of years, but the universe's expansion has stretched the space between galaxies, making the observable universe much larger than its age suggests.

The explanation involves concepts like the cosmic microwave background, the Hubble sphere, and the distinction between light travel time and present-day distance.

Cosmologists calculate the observable universe's size by integrating the distance light can cover while accounting for the changing scale factor of the universe.Parameters such as the expansion rate and dark energy proportions influence these calculations.The article clarifies that ancient photons have crossed a changing geometry, with their journey lasting nearly 13.8 billion years while the present distance between endpoints grew to about 46 billion light-years.This understanding underscores the dynamic nature of the universe and how its expansion affects our perception of cosmic distances.