Astronomers have reported the discovery of a new galaxy using the James Webb Space Telescope (JWST) as part of the JWST COSMOS-Web survey. The newfound object, designated JWST-ER1 is a massive and compact quiescent galaxy. The findings were detailed in a paper published September 14 on the pre-print server arXiv.
1" means 1 arcsecond, not 1 inch, for the Americans. 1 arcsecond is 1/60th of an arcminute. 1 arc minute is 1/60th of degree. So the 1" scale shown represents 1/3600th of a degree. The object is measured at 1.54 arcseconds