“No other candidate galaxy has been found at such a great distance that also gives you the spatial information that this arc image does,” said Brett Salmon of the Space Telescope Science Institute in the US.
SPT0615-JD was identified in Hubble’s Reionization Lensing Cluster Survey (RELICS) and companion S-RELICS Spitzer programme.
By combining the Hubble and Spitzer data, Salmon calculated the lookback time to the galaxy of 13.3 billion years.
“This galaxy is an exciting target for science with the Webb telescope as it offers the unique opportunity for resolving stellar populations in the very early universe,” he said.
“By analysing the effects of gravitational lensing on the image of this galaxy, we can determine its actual size and shape,” said Salmon.