MACS0647-JD

If the distance estimate is correct, it formed about 427 million years after the Big Bang.

The galaxy was discovered with the help of Cluster Lensing And Supernova survey with Hubble (CLASH), which uses massive galaxy clusters as cosmic telescopes to magnify distant galaxies behind them, an effect called gravitational lensing.

[7] MACS0647-JD was announced in November 2012, but by the next month UDFj-39546284, which was previously thought to be z = 10.3, was said to be at z = 11.9,[8] although more recent analyses have suggested the latter is likely to be at a lower redshift.

[9] Infrared NIRCam imaging of MACS0647-JD by the James Webb Space Telescope (JWST) in September 2022 determined a photometric redshift of 10.6±0.3, in agreement with the previous Hubble estimate.

Additional spectroscopic observations by JWST will be needed to accurately confirm the redshift of MACS0647-JD.

MACS0647-JD is very young and only a tiny fraction of the size of the Milky Way . [ 6 ]
In this James Webb Space Telescope image of galaxy cluster MACS0647, the massive gravity of the cluster acts as a cosmic lens to bend and magnify light. [ 10 ]