Detailed observations of star forming galaxies at high redshift are critical to understand the formation and evolution of the earliest galaxies. Gravitational lensing provides an important boost, allowing observations at physical scales unreachable in unlensed galaxies. We present three lensed galaxies from the RELICS survey at
, including the most
highly magnified galaxy at (WHL0137-zD1, dubbed the Sunrise
Arc), the brightest known lensed galaxy at (MACS0308-zD1),
and the only spatially resolved galaxy currently known at
(SPT0615-JD). The Sunrise Arc contains seven star-forming clumps with delensed
radii as small as 3 pc, the smallest spatial scales yet observed in a
galaxy, while SPT0615-JD contains features measuring a few tens of parsecs.
MACS0308-zD1 contains a pc clump with a star formation rate (SFR) of
, giving it a SFR surface density of
galaxies provide a unique window into small scale star formation during the
Epoch of Reionization. They will be excellent targets for future observations
with JWST, including one approved program targeting the Sunrise Arc.