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Featured Photograph

Crescent and Soap Bubble Nebulae

This is an image of the Crescent Nebula and, to its lower left, the spherical Soap Bubble Nebula. The former (NGC 1688) is a beautiful emission nebula resulting from a massive Wolf-Rayet star shedding its outer layers. The latter is a planetary nebula – a shell cast off by a dying star. Both objects are found in the constellation Cygnus.

This image was created using about 25 hours of Ha and O-III data, as well as three hours of RGB data for the stars. The O-III signal, heavily concentrated in the outer shell of the Soap Bubble Nebula, allows it to be seen against the strong Ha background.

Matt Anderson


The featured photograph is any astronomical photograph provided by one of our members. If you are a member and have a photograph you would like to submit, please refer to the Featured Photo Guidelines for more information.  The submission deadline is the 15th of each month.   

Of Note

Read the recent New York Times article celebrating Flagstaff’s dark skies which featured CAS member Jim Glish and some of his stunning astrophotography.

New York Times Article

Members contributions on the Mars and Saturn Conjunction

Jupiter Saturn Conjunction

CAS donation of SeeStar Telescope under Outreach

SeeStar Donation

Special Events

Activities for November 2026


Saturday, November 21, 2026 (6:45–8:00 pm) 

Meeting Content: CAS Member Activity Presentations, Election of 2027 Board and Trustees, Membership Approval of 2027 Budget

Presenters:


CAS Monthly Meetings and Astronomical Programs are held the Saturday closest to the Full Moon at the Mars Hill Campus of Lowell Observatory, Hendricks Center for Planetary Studies Auditorium (6:45 pm - 8:00 pm), unless otherwise noted followed by refreshments, and informal discussion. Meetings are open and free to the public.


info@coconinoastro.org



Please visit the following organizations!

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