From 11/19/2016: Glenn Walsh talking about the 75th Anniversary of Pittsburgh’s Buhl Planetarium Observatory as well as its historic and unique 10-inch Siderostat-type Refractor Telescope.
From 11/19/2016: Glenn Walsh talking about the 75th Anniversary of Pittsburgh’s Buhl Planetarium Observatory as well as its historic and unique 10-inch Siderostat-type Refractor Telescope.