EMDSO is an acronym for Eastern Missouri Dark Sky Observers. We are a group of amateur astronomers interested in sharing our interest in astronomy with each other and the general public.

We have our monthly business meeting at various locations in the area of Union or Washington, Missouri. Frequently, they are at members homes or the public library.

During the months of March through October, we host public open telescope nights at our Big Blue Observatory in Cedar Creek Community Center New Haven, MO and at East Central College located off Hwy 50 in Union, MO. Telescope observing begins just after dusk and continues as long as the club volunteers wish to stay. Please see 2024 Observing Schedule