The county is considering ways to preserve dark skies around the observatory (via Fairfax County Government)

An effort is underway to preserve the dark skies around the Turner Farm Park Observatory in Great Falls.

To reduce light pollution in the area, Fairfax County is considering amending zoning standards for outdoor lighting within one-half mile of the observatory, which is located at the intersection of Georgetown Pike and Springvale Road.

The observatory has several telescopes and a former National Defense Mapping Agency observation tower. Since the spring of 2018, the facility has served more than 3,700 people with educational programming.

Changes would largely impact residential development — roughly 500 properties — surrounding the observatory.

So far, county staff indicate that residents appear split about possible changes to the zoning rule. An official proposal expected in the winter of this year.

“Comments received in support of additional regulations expressed that the amendment would be an important and valuable step in protecting dark skies and the use of the observatory,” staff said in a memo. “Comments in opposition indicated that additional regulations are not needed, and concerns were expressed about several issues, including safety and security, and whether additional regulations within ½ mile of the observatory would be meaningful, given the overall light pollution of the area.”

The county held a public meeting on the issue on Monday (Sept. 19). Residents and community organizations offered feedback on the existing conditions near the observatory and possible changes that could affect properties within a one-half-mile radius of the observatory.

Representatives for the Fairfax County Police Department noted that proper lighting is a deterrent for criminal activity, but overnighting and uplighting are not required to facilitate a safe environment.

The Great Falls Citizen Association held the first official public meeting on the issue on March 24. The association has historically supported efforts to preserve the area’s dark skies.

“Because this proposed amendment involves a unique set of circumstances, GFCA is in the process of evaluating the County’s preliminary concepts on the amendment and considering its impact on the community, following two Town Hall sessions GFCA hosted,” Peter Falcone, a spokesperson for the association, wrote in a statement.

The observatory is also working toward becoming an official urban night sky place from the International Dark Sky Association.

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