VIRUS focal surface

VIRUS focal surface

Focal surface of Hobby-Eberly Telescope

This image shows the ‘focal surface’ of the Hobby-Eberly Telescope, where the optical fibers of VIRUS are arrayed. The circles each contain a square grid of 448 fibers. When the telescope is pointed and VIRUS takes an observation, each of the 32,000 fibers takes a spectrum simultaneously, recording a vast array of information on the speed, direction, and chemical makeup of every point inside the field of view, which is about the size of the full Moon.

IMAGE: J. Pautzke/E. Mrozinski/G. Hill/HETDEX Collaboration