Welcome to the BASS Home Page

The Boulder Astronomy & Space Society is dedicated to the interests of the observers and space enthusiasts of all types in Boulder, Colorado. It is our goal to provide common ground for Boulder's amateur, professional, and academic communities to share their enthusiasm about the universe around us. Our meetings are generously hosted on the University of Colorado campus at Fiske Planetarium and Sommers - Bausch Observatory and are open to students and the public alike. See the Events page for more details.

To join BASS come to a meeting or fill out this form and mail it in along with your check to the Boulder Astronomy and Space Society, PO Box 17203, Boulder CO 80308.


  • BASS Meeting, Saturday June 21st, 7PM, at Sommers-Bausch Observatory on the CU Boulder Campus. The featured talk is "LCOGT: Robot Telescopes Rule the Time Domain". Dr. Tim Brown of Las Cumbres Observatory Global Telescope Network (LCOGT). Time domain astronomy is the study of things that change in the sky on human timescales. This includes outburst events like discovering super novae, and transit events like exo-plants travel across their host stars, and many other objects of high interest.

Observing to follow on the SBO deck telescopes if the weather permits.





Forum Astronomique

Next Forum Astronomique: TBD






Ethos meets FirstScope

Ethos meets FirstScope - BASS pushes the limits of new equipment testing at a BASS meeting!

Possibly a first, $600 eyepiece on a $30 telescope. While not exactly compatible, both components do have their merits!






The Horsehead and Flame nebulae by BASS member Cheyenne Wills.   Taken at Crow Valley using a DSLR camera on the telescope. The image consists of three stacked 2-minute exposures at ISO 1600.