In 1840, John W. Draper became the first person to photograph a celestial object when he took a daguerrotype image of the Moon. As his technique improved, Draper captured more detail of craters and other features on the moon’s surface. It quickly became clear that photography would revolutionize astronomy. Astronomers began to use photographs to collect precise records of the position, brightness, spectra and features of celestial objects, and no longer had to rely on their hand-drawn sketches and log notes. The first daguerrotypes and photographs were not very sensitive and were complicated to use.