Webb’s First Deep Field, This image of galaxy cluster #SMACS0723 is overflowing with detail as it appeared 4.6 billion years ago.
Thousands of galaxies {Most appear as fuzzy ovals, but a few have distinct spiral arms} – including the faintest objects ever observed in the infrared – have appeared in Webb’s view for the first time. This slice of the vast universe is approximately the size of a grain of sand held at arm’s length by someone on the ground.
This deep field, taken by Webb’s NIRCam is a composite made from images at different wavelengths, totaling 12.5 hours –achieving depths at infrared wavelengths beyond the Hubble's deepest fields, which took weeks.
It shows the galaxy cluster #SMACS0723 as it appeared 4.6 billion yrs ago. The combined mass of this #SMACS0723 acts as a gravitational lens, magnifying much more distant galaxies behind it. Webb’s NIRCam has brought those distant galaxies into sharp focus.
https://webbtelescope.org/contents/media/images/2022/038/01G7JJTZJTA8BY731JS2S7P5SZ?news=true
Shambhu 
