DAS Activities

DAS Public Nights

Public Nights
Tuesday and Thursday at
DU's Historic Chamberlin Observatory
Current start time is 7:30 pm
Costs to the public are:
$4.00 adults, $3.00 children

To book, please click:

Public Night

Membership & Donations

Membership Applications and Donations

Membership in The Denver Astronomical Society is open to anyone wishing to join.
Annual membership fees are $36 for adults, $60 for Family/Dual Members, and $12 for students


You may also pay with a check by filling out and mailing the form linked below.


Benefits of DAS Membership

  • Learn more about astronomy and CCD imaging! Contact with over 500 professional and amateur astronomers through educational monthly meetings, the DAS Yahoo Group, public outreach activities.
  • Hone your observing skills! Participate in Messier marathons, star parties, and other activities.
  • Access to dark skies! Anytime access to the E.G. Kline Dark Site near Deer Trail, CO for observing & imaging.* (See note below)
  • Contribute Useful Data to Science. Use your skills to collect scientific data on variable & double stars, asteroids, occultations & eclipses.
  • Subscription to The Denver Observer, the monthly DAS newsletter. Learn about upcoming astronomy & social events, including star parties.
  • Access to the DAS Yahoo Group including the ability to post and view messages, images, and files.
  • Discounted subscriptions and book offers from Sky & Telescope and Astronomy magazines.
  • Checkout privileges for the extensive and historic collection of books and periodicals in the Chamberlin Observatory library.
  • Access to several club-owned loaner telescopes for personal observing. (After 3 months of membership)
  • Fun social activities, including a summer picnic, holiday party in December, and annual banquet in March.
  • Participation in public education programs, providing observing opportunities, multimedia presentations, and speakers at Chamberlin Observatory and for Front Range schools and civic groups; Space Day in the spring, Colorado Astronomy Day in the fall.
  • A valuable included membership in the Astronomical League, which provides:
    • subscription to The Reflector, the AL’s quarterly magazine,
    • book discounts
    • special member rate for the annual ALCON conference
    • recognition of your observing/imaging achievements and public outreach activities through access to the AL’s observing clubs, public outreach, and Master Observer programs
    • knowledge that you are supporting amateur astronomy and public education through national outreach activities.

* New members may use the dark site immediately, but must receive an orientation from a Dark Sky Committee member on a Dark Sky (new moon) Weekend to use all of the facilities independently.

Additional Information

The DAS is a 501(c)(3) tax-exempt corporation and has established three tax-deductible funds:

To contribute to one of these funds, please see Donation Section of the PayPal Store

NOTICE TO EXISTING MEMBERS: Except for new members who joined after December 1, 2017, all people who were members during 2017 must renew their DAS membership, effective January 1st 2018, by March 31st of 2018. Members who did not renew by March 31st 2018 will need to reactivate their membership with a New Member Application. (NOTE: DAS members reactivating their membership after a delay in renewal beyond March 31, 2018 will not receive the prorated membership discount.)

NEW MEMBERS: Welcome to the DAS! In early January of the year after you joined, you will receive a renewal bill for a prorated amount for your second year of membership, equal to the number of months between the month you joined and the end of your joining year, multiplied times $3.00. (For example if you joined in July you would pay only $18.00 [6 months x $3] to renew on January 1st.)

Feel free to ask: Membership Coordinator (membership, renewal, signup questions) or
Webmaster (problems with the site)