An observatory could be forced to close down because of dust from a proposed mine site, its director has warned.
James Barclay is the director at the Kingaroy Observatory, formerly known as Maidenwell.
He's concerned dust raised from operations at the planned coal mine near Kingaroy could cloud telescopes at his facility.
MRV Tarong Basin Coal Pty Ltd is planning to extract five million tonnes of coal a year and was given the green light to advance through the legislative approvals process on Tuesday.
The company, owned by Moreton Resources, has formally been notified of its "terms of reference for an environmental impact statement".
The observatory is located about 3km from the mine site at Kingaroy Airport.