Most optical telescopes are housed within a dome or similar structure, to protect the delicate instruments from the elements. Telescope domes have a slit or other opening in the roof that can be opened during observing, and closed when the telescope is not in use.

What is an observatory dome?

A dome is the individual building that houses one telescope to protect it from the weather (rain, wind, snow, and sunlight). ... Astronomers can turn the dome and point the telescope, so that the telescope “looks” through the slit, to observe celestial objects.

How much does an observatory dome cost?

The total budget for an observatory can range from $50,000 to more than $500,000, depending on how technologically advanced the equipment and the size and complexity of the structure.