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Welcome to the Big Sky Astronomy Club

The Big Sky Astronomy Club is a group of dedicated amateur astronomers located in the beautiful Flathead Valley of Northwestern Montana.

Inside you will find information about our club, our monthly meetings, Star Parties and other events (both past and future), resources for observing plus

a poignant and special message from the late Dr. Carl Sagan.

We cordially invite you to

"Discover the Universe with The Big Sky Astronomy Club"

BSAC Gains Tax-Exempt Status

June 30, 2011

The Big Sky Astronomy Club was created during the fall of 2000 as Non-Profit corporation, registered with the State of Montana. This, however, didn't afford us tax exempt status with the Internal Revenue Service.

During the first months of 2011, club members began the arduous task of assembling the documentation necessary to apply to the I.R.S. for 501(c)(3) tax-exempt status.

On July 30, 2011, we excitedly received word from the I.R.S. that our application had been approved and that the Big Sky Astronomy Club was now (and retroactively to our formation in October of 2000) considered to be a 501(c)(3) tax exempt, non-profit, charitable organization. As such, contributions to our club are fully tax deductible.

If you'd like to help out with a donation, the club has a PayPal© account set up. See our "About Us" page for more information.

2015 Lone Pine Star Party

July 18, 2015

Montana State Parks Logo

For the tenth year in a row, the Big Sky Astronomy Club and Lone Pine State Park will host what has become one of our most popular summertime events on July 18, 2015. Club president, Mark Paulson, will offer an interesting PowerPoint presentation entitled "Stargazing With the Big Sky Astronomy Club" starting at 9 PM in the Visitors' Center conference room. An observing session (lasting until 1 AM) will follow, allowing our visitors to view planets, double stars and several deep-sky objects through our club members' telescopes.

Please mark your calendars for this fun and educational event.

2015 Logan Pass Star Parties

July and August 2015

National Park Service Logo

The Big Sky Astronomy Club, in conjunction with Glacier National Park, will once again host three star parties this summer under extremely dark skies at the Logan Pass Visitors' Center parking lot at the summit of Going-To-The-Sun-Road.

The events are extremely popular, with attendance at each event approaching four or five hundred visitors. The three 2015 dates have not been firmed up quite yet. Please check back with us during the upcoming months as we establish the dates for these fun events.

2015 Montana Starwatch

August 14 - 16 2015

Ruby Valley, Montana

The Big Sky Astronomy Club will host our fourth annual state-wide star party, Montana Starwatch this summer on private property near Twin Bridges, Montana. The property is owned by BSAC club member Joe Witherspoon. This will be the fourth year that the star party has been held at this wonderful, dark sky site. We are hoping that we won't have a repeat of the excrutiatingly poor weather that we did last year. The weather gods played havoc with our weekend and brought clouds and rain, which allowed us great views of the "H2O Nebula" but nothing else.

Despite the poor weather, everyone's spirits were high and all who braved it had a fun time.

We are planning two great presentations on the Friday and Saturday nights of the star party.

For more information, including a registration form for the event, please see the official Montana Starwatch website at:

2015 G.N.P. Summer Stargazing

Summer Weekends, 2015

The Big Sky Astronomy Club will once again work with the management of Glacier National Park to put on a very popular Summer Stargazing Program at the Apgar Transit Center on the west side of the park and at St. Mary on the east side. Over the past four years, literally thousands of visitors have had a chance to view sunspots on the face of our Sun during daylight hours and then, each evening, they have had an opportunity to view many of the interesting deep sky objects visible through telescopes of various types and sizes under the truly dark skies found in Glacier.

If you'd like more information on this program, please contact Park Headquartes at 406-888-7800.

BSAC Missoulian Article

November 14, 2013

Big Sky Astronomy Club member Joe Witherspoon and his personal observatory located outside of Twin Bridges, Montana, were featured in a very nice article published in the Missoulian newspaper on Thursday, November 14th, 2013.

The in-depth article described Joe's interest in astronomy, his personal observatory and what prompted his eventual move to Twin Bridges, having lived in the light pollution of Tacoma, Washington for many years.

The article can be read online at the Missoulian's website by clicking here.

BSAC Daily Inter Lake Article

September 4, 2013

The Big Sky Astronomy Club was featured in a very nice article published in Kalispell's Daily InterLake newspaper on Wednesday, September 4th, 2013.

The article described our history, our many outreach efforts along with our plans to build an observatory/education center and purchase a portable planetarium for use in our educational outreach.

The article can be read online at the Daily Inter Lake's website by clicking here.

BSAC Club Telescope