James Webb Space Telescope snaps first ever images of star-forming clusters inside distant galaxies

Studying ancient stellar clumps gives us new insights into galaxy formation.

The James Webb Space Telescope captured this image of a galaxy cluster (SMACS0723). The five zoomed in galaxies are so far away that we observe them as they were when the Universe was between one and five billion years old. Today the Universe is 13.7 billion years old. Credit: Image adapted from image release by NASA, ESA, CSA, STScI.