Frank Kovac, a paper-mill worker from Monico, Wis., spent 15 years building a planetarium in his backyard. The structure is 22 feet (6.7 meters) wide and weighs 2 tons (1,818 kilograms).
(Image: © Frank Kovac/Kovac Planetarium)
Frank Kovac, 45,
Years ago, Kovac had
"To be a
Tickets for the
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