Not an photo gallery, but the homepage of the U.S. Naval Observatory. Search around this site to find images of telescopes and tools used to build astronomical measuring devices.
The USNO serves as the official source of time for the Department of Defense and the standard of time for the United States. The U.S. Naval Observatory is one of the oldest scientific agencies in the country. Today, the U.S. Naval Observatory is the preeminent authority in the area of precise time, and distributes data required for accurate navigation and astronomy.
History
