Max goes to the main mirror, to find out who the ghost is.

The spinning makes the glass the same shape as the main mirror used in a telescope.

From 1999 to 2005, its main mirror was the largest in the world.

Its main mirror, almost 8 feet across, is the most accurate ever made.

It will have a main mirror that is 6.5 meter (21.3 feet) wide.

This step would involve using devices that slightly change the shape of the main 94.5-inch mirror.

The main mirror features a honeycomb design to reduce mass.

Its main mirror will have only six circular segments surrounding a central one.

The first step was a precise characterization of the error in the main mirror.

The construction of the main mirror was begun in 1979 and completed in 1981.