Springfield Science Museum
... that the Springfield Science Museum is home to the oldest operating projection planetarium in the United States?
... that the <b id="mwpw"><a href="./Springfield_Science_Museum" id="mwqA" rel="mw:WikiLink" title="Springfield Science Museum">Springfield Science Museum</a></b> is home to the oldest operating projection <a href="./Planetarium" id="mwqQ" rel="mw:WikiLink" title="Planetarium">planetarium</a> in the United States?