Kitt Peak opens up its 158‐inch telescope

The ceremony known as “letting in the first light” was recently held for the new 158‐inch telescope at Kitt Peak National Observatory. The telescope, which will be the second largest optical telescope in the world when it is dedicated in June, is named the Mayall telescope in honor of Nicholas U. Mayall, director of KPNO for eleven years. The new instrument is expected to be in full operation in October.