UNCOVER-z13 is a high-redshift Lyman-break galaxy discovered by the James Webb Space Telescope (JWST)[1] during NIRCam imaging for the JWST Ultradeep NIRSpec and NIRCam Observations before the Epoch of Reionization (UNCOVER) project[2] on November 14, 2023.

UNCOVER-z13 was first observed when large amounts of gravitational lensing from Abell 2744 made the galaxy visible.

The gravity of Abell 2744 warps the fabric of space-time sufficiently to magnify the light of more faraway galaxies.

The James Webb Space Telescope used the gravitational lensing to discover UNCOVER-z13.

UNCOVER-z12 has a redshift of 12.393, making it the fourth-most distant object ever observed.