moved from Duane Physics to the new space. A permanent roll off roof was installed in 1986 and with it also came the installation of an extra 18-inch teaching telescope. 1986 was also the year that SBO received CCD technology to fit onto their telescopes. The Observatory was one of the first university observatories to acquire the technology, with the Observatory’s detector in particular being designed and built for the Hubble Space Telescope and Galileo mission. This greatly increased the research use for the Observatory given the 60X sensitivity. In 1989, the Astrophysical & Planetary Sciences Department introduced the lab/lecture Introduction to Astronomy courses, which greatly benefited from the new technology and expanded the involvement of undergraduate students. The Observatory was renovated again in 1997, converting two of the darkrooms into a computer lab that currently hosts 38 computers. The lab is used by undergraduates, graduates, and groups such as the Summer Science Program. The original dome slit was replaced in 2005 by Ash-Dome. In 2006, the original lens for the Bausch & Lomb telescope cracked beyond repair due to constant heating and cooling from use in the heliostat. The 18-inch and 16-inch teaching telescopes on the Observing Deck were replaced by two 20-inch Planewave CDK telescopes in 2017, named Artemis and Apollo. Visiting the observatory The observatory hosts free public open houses on Friday nights, hosted by students and faculty. In addition to the open houses, the observatory is open to the public during astronomical events such as lunar eclipses. See also List of observatories References Astronomical observatories in Colorado University of Colorado Boulder campus Tourist attractions in Boulder, Colorado