Britain's only "Dark Sky Park" has prompted a tourism boost in South West Scotland during the traditional "off-season".
Galloway Forest Park became Galloway Forest Dark Sky Park in November 2009, during the International Year of Astronomy.
It involved every light bulb in the area being changed to downward-facing "dark-sky" bulbs, to stop light pollution.
Forty-seven residents living within the confines of the park also agreed to change their own bulbs in support of the bid.
The pitch-black sky makes it an ideal spot for stargazers who can see the Milky Way and Andromeda galaxies, as well as all 18 constellations visible in the northern hemisphere.
The stargazing season runs during from October to March, and an economic impact report said as a result extra visitors have been pulled into the area during the off-season.
The total cost to transform the area was about £21,000, paid for by the government body Forestry Commission Scotland (FSC), which made the bid.
A total of 35 businesses in Galloway, including guest houses, bed and breakfasts, hotels and self-catering properties, were surveyed, with 77% reporting an impact on the number of bed nights as a result of the Dark Sky Park.
The Dark Sky Park Economic Impact Assessment, carried out by ekos for FCS, said £40,584 has been returned in "additional expenditure" as a result of an increase in visitors, meaning for every £1 spent on transforming the area, there has been a return on investment of £1.93.
The report's authors said that the benefits it highlights could just be the tip of the iceberg.
These factors include visitors who may come to the area only for the day and visitors who may opt to stay with friends and relatives rather than at paid-for accommodation.
The majority (84%) of businesses said they feel the Dark Sky Park is potentially important in attracting visitors to the area, and 81% said this was relevant, particularly in the "quieter" part of the year.
Mr Muir added that stargazers and skywatchers were in for a treat later this year with four separate meteor showers expected to be spotted over Scotland's skies.
He said the next main event in the astronomical diary is the Perseids shower in August, a steam of debris consisting of particles ejected by the comet Swift-Tuttle as it travels on a 130-year orbit.
Mike Alexander runs Galloway Astronomy Centre, a bed and breakfast near Whithorn, which has an observatory in the grounds.
He said they are already "full-to-the brim" over the weekend of August 12/13, when the shower is expected to take place.