Prairie Grass Observatory

Prairie Grass Observatory Prairie Grass Observatory (PGO) is an astronomical observatory on the grounds of Camp Cullom, a youth camp in Clinton County, Indiana.

Prairie Grass Observatory (PGO) houses four telescopes: a 28” aperture Dobsonian, a 16” LX200R Schmidt-Cassegrain, a 16” Newtonian, and a 7” apochromatic refractor. There is also a pair of giant 25/40X100 binoculars and a hydrogen-alpha filter for solar viewing. PGO holds Stargazing Open House events that are open to the public. For dates, times, and directions to the facility, please see the webs

ite: http://www.indianastars.com . To arrange private group events at other times, or to visit the facility during non-scheduled events, please contact Andrew Schilling at [email protected] or Russ Kaspar at [email protected]. For a satellite map to the facility, please see the following website: http://www.iasindy.org/DirectionsToPrairieGrass.html .

See you at Camp Cullom this weekend for the Indiana Family Star Party…Indiana’s largest annual gathering of Astronomers!...
08/06/2026

See you at Camp Cullom this weekend for the Indiana Family Star Party…Indiana’s largest annual gathering of Astronomers!!!! Hosted each year by Wabash Valley Astronomical Society, Muncie Astronomy Club and Indiana Astronomical Society!

We will be passing these out at the door at the Lodge for the 11:30 Slipher Dedication. Lowell Observatory, Indiana Uni...
08/04/2026

We will be passing these out at the door at the Lodge for the 11:30 Slipher Dedication. Lowell Observatory, Indiana University Astronomy Department, Mayor of Frankfort and Slipher Family Members will be at this event too! The marker will soon be placed in front of Old Stoney, Vesto and Earl Slipher’s High School before going to Indiana University and Lowell Observatory. More about the 23rd Annual Star Party this weekend at Camp Cullom: https://clintoncountydailynews.com/indiana-family-star-party-august-7th-and-8th-opens-up-the-stars-for-indiana-families/

Come to the 2026 Indiana Family Star Party! Coming Soon to Camp Cullom! Learn More:
07/31/2026

Come to the 2026 Indiana Family Star Party! Coming Soon to Camp Cullom! Learn More:

Families across central Indiana will have a chance to explore the night sky during the 23rd annual Indiana Family Star Party, set for August 7 and 8 at Camp Cullom near Frankfort. The event, known as the Midwest’s premier family-focused star party, invites visitors to experience dark rural skies, ...

No Openhouse at Prairie Grass Observatory Tonight, Friday July 10th. Over 80% Cloud Cover expected by NWS. No PGO Ope...
07/10/2026

No Openhouse at Prairie Grass Observatory Tonight, Friday July 10th. Over 80% Cloud Cover expected by NWS. No PGO Open house Tonight. Remember the Annual Star Party August 7th and 8th. See you there!

Two Clinton County Farm Boys Changed Humanity's Understanding of the Universe: Indiana Marker Coming. Will Be Unveiled a...
06/23/2026

Two Clinton County Farm Boys Changed Humanity's Understanding of the Universe: Indiana Marker Coming. Will Be Unveiled and Dedicated at 2026 Indiana Family Star Party before Installation Later In Fron Of Old Stoney.

Join us tonight for MOON night at the Observatory! Saturday June 20th. We can deal with a FEW light clouds, since the m...
06/20/2026

Join us tonight for MOON night at the Observatory! Saturday June 20th. We can deal with a FEW light clouds, since the moon is an easy object. Park east of the Nature Center/Museum. :>)

05/15/2026

The skies are beginning to clear at PGO. Clear Sky Clock is showing good viewing from sunset until 11pm. We are a go for tonight's open house!!

05/15/2026
05/14/2026

The forecast is looking favorable for tomorrow night's open house. If the forecast holds, plan on joining us at 8:45 pm on May 15th to do some Stargazing.

04/18/2026

Due to new information related to today's cloud forecast, this evening's public open house at PGO is canceled. If only we could control the weather!!!

Address

6815 W County Road 200 N
Frankfort, IN
46041

Telephone

+17656501045

Website

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