Washington, DC 2009

Ultraviolet Telescope placed on the Moon by Apollo 16

It's main discovery was the two UV-glowing rings around Earth, shown in the small image at the bottom.

Photos taken by the FUVC telescope: https://www.flickr.com/photos/steamarchive/albums/72157710987035188/with/48764596911

More details: https://spacecenter.org/remembering-dr-george-carruthers