DAS Activities

DAS Public Nights

Public Nights
Tuesday and Thursday at
DU's Historic Chamberlin Observatory
Current start time is 8:30 pm.

Costs to the public are:
$4.00 adults, $3.00 children

To book, please click:

Public Night Reservations



Our Chief Observer

Jack and his small Newt

Jack Eastman, Chief Observer of the Denver Astronomical Society, is without a doubt one of the better known figures in amateur astronomy today. The picture at left shows Jack at one of the Denver Astronomical Society’s Public Open Houses, held at Chamberlin Observatory. He is proudly displaying his smallest home-built telescope: a Newtonian with a 1.5-inch mirror cut from the center of the primary mirror of the first Celestron Schmidt-Cassegrain (a telescope configuration that Jack helped to design.)

Also pictured (below) is Jack’s six-inch 1870’s Alvan Clark refractor.

Jack is an avid planetary, solar and double star observer. He brings a wealth of experience to every meeting and function that he attends. He has hobnobbed with many of the big names in astronomy. Yet Jack is eminently approachable and self-effacing. He finds it hard to believe that for many amateur astronomers, meeting him would really make their year.

Jack’s beloved Alvin Clark refractor

Jack was the recipient of the Western Amateur Astronomers 2003 G. Bruce Blair Award.

At our General Meetings, Jack is always coming up with detailed observing reports and sketches. At the bottom of this page, you will find a link to some of these, as well as articles about Jack’s telescopes. Download these articles and interpret them as you see fit. These astronomical observations of Jack’s are for those who have been in amateur astronomy for a bit.

See Jack’s articles in the “D-Files”