The galaxy is 33 billion light years away now but the light started coming toward is when it was 13 billion light years away. The article is basically an introduction to this concept mentioned toward the end of the article:
“To avoid confusion, astronomers actually use two distance measurement scales: a co-moving distance that eliminates the expansion of the universe as a factor and a proper distance that includes it. That means the co-moving distance of JADES-GS-z14-0 is 13.5 billion light-years, while its proper distance is 33.8 billion light-years.”
The galaxy is 33 billion light years away now but the light started coming toward is when it was 13 billion light years away. The article is basically an introduction to this concept mentioned toward the end of the article:
“To avoid confusion, astronomers actually use two distance measurement scales: a co-moving distance that eliminates the expansion of the universe as a factor and a proper distance that includes it. That means the co-moving distance of JADES-GS-z14-0 is 13.5 billion light-years, while its proper distance is 33.8 billion light-years.”
Oops ! That article citation mixed them up … the comoving is the 33.8 one here … while the light travel distance is the 13.5.