Filters on the Liverpool Telescope
Credit: LT

Most astronomical instruments available today only measure the brightness or intensity of things - they are not able to measure colour at the same time.

GranTeCan Telescope

The Gran Telescopio Canarias, also known as GranTeCan or GTC, is a 10.4 metre telescope, which began operations in 2009. The GTC Project is a partnership between Spain, Mexico, the University of Florida and the Instituto de Astrofísica de Canarias (IAC).

Ray Diagrams