First light with MOSFIRE, and unprocessed image of the interacting galaxies NGC4038 and NGC4039, credit: W. M. Keck Observatory
An unprocessed image from the MOSFIRE instrument made on the “first light” night of April 4, 2012. The powerful Keck I telescope and sensitive new instrument were able to gather this infrared image of two interacting galaxies called The Antennae, despite fast-moving high clouds over Mauna Kea that night. Credit: W. M. Keck Observatory