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.
