View the heavens through the 20-inch Alvan Clark-Saegmuller refractor telescope at DU’s Historic Chamberlin Observatory. 

Public Night

Public nights at the Chamberlin are our most popular events, and they are nearly always sold out six or more months in advance. If a date is greyed out, it IS sold out. Unfortunately, we do not have a waiting list for last-minute cancellations and cannot accommodate unscheduled walk-ins.

All public nights start with a DAS lecturer’s informative, multi-media astronomy presentation. Astronomy presentations are designed for visitors of all ages and may be illustrated with colorful computer graphics shows, videos, and/or whatever audio/visual method is appropriate.

After the presentation, visitors will be treated to telescopic views of the moon, stars and star clusters, planets, galaxies, nebulae, etc., through Chamberlin’s historic, 28-foot long, 20-inch aperture Alvan Clark-Saegmuller refracting telescope (weather permitting). On cloudy nights, visitors will view and learn about the telescope and receive a tour of the observatory, including its various clocks, the meridian telescope, the library, wall displays, and an animated video display of the night sky for that month. DAS volunteers will happily answer questions about astronomy, astronomical observing, and the observatory.