The Ask An Expert lecture series at the National Mall building is presented every Wednesday at noon. A Museum staff member talks to the public about the history, collection, or personalities related to a specific artifact or exhibition in the Museum.

“Proto-curator riding large telescope.” Photo by Don Hayes.

The lower end of the 36-inch refractor,  David, Steve, and Judith DeVorkin, Lick Observatory Summer 1965. Photo by Howard DeVorkin.

How to attend

National Air and Space Museum in Washington, DC

6th St. and Independence Ave SW. Washington, DC 20560