Our FREE Open Houses are held on most Friday evenings when CU classes are in session (during the spring, summer & fall semesters).
Aug. 27 at 8pm In-person
Sept. 10 at 8pm In-person
Sept. 17 at 8pm In-person
Sept. 24 at 8pm In-person & Virtual Open House (tune in here)
Oct. 1 at 8pm In-person
Oct. 8 at 8pm In-person
Oct. 15 at 8pm In-person
Oct. 22 at 8pm In-person
Oct. 29 at 8pm In-person & Virtual Open House (tune in here)
Nov. 5 at 8pm In-person
Nov. 12 at 8pm In-person
Thursday, Nov.18 at 8:30pm - Partial Lunar Eclipse In-person & Virtual Open House (tune in here)
Dec. 3 at 8pm In-person
CU Boulder has returned to requiring masks in public indoor spaces (including the observing deck) regardless of vaccination status as of August 13, 2021.
Practice good hygiene during your visit by washing your hands or using the sanitization stations. Bring your own reusable water bottle to use at the automatic, contactless water bottle filling station (water fountains have been disabled for your safety). Please respect your fellow visitors. Some may prefer to continue to social distance as we all adjust to the changes.
Open houses are only held when the skies are clear. If you're not sure if we'll be open, check out our local weather or call us for an observing status at 303.492.2020.
There is no charge for the Observatory's Open House nights ... the stars are free to everyone! Sessions typically last from 1-3 hours, depending upon the weather, the quality of the night.