McAuliffe-Shepard Discovery Centre unveils observatory With the flick of a switch, a 58-inch plasma screen will come alive Friday, Sept. 4, featuring images from the new observatory telescope at the grand opening of the McAuliffe-Shepard Discovery Centre's new observatory dome in Concord. The dome houses two telescopes for viewing daytime and evening skies. The primary telescope, a Celestron 14-inch Schmidt-Cassegrain, uses a Celestron PRO mount, computerized for tracking planets, nebulae, galaxies and other nighttime objects.