Takayuki Ohira creates planetariums for everyone.

By Lisa Katayama

Takayuki Ohira made his first planetarium when he was 10 years old. It was a simple desktop device with tiny holes burned into sheets of paper and illuminated with light bulbs. Now 38, Ohira is the inventor of the Megastar — the world’s most advanced planetarium projector, according to the Guinness Book of Records. And he does it all by hand in his tiny office near Tokyo.

After building several pinhole versions as a teen, Ohira became obsessed with the idea of creating a much more complex planetarium. He experimented with techniques acquired through his part-time job at ...

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