◆ On this day

September 23

2 sourced moments from September 23 in history: Neptune was predicted by math in 1846, with a dose of luck; and Nintendo was founded as a playing-card company (1889).

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2 things happened on September 23

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1889 Society & Economy · Business & Markets

Nintendo was founded as a playing-card company

Before consoles and plumbers, Nintendo made hand-painted Japanese flower cards in a Kyoto workshop.

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1846 Space · Solar System

Neptune was predicted by math in 1846, with a dose of luck

Neptune turned up within one degree of Le Verrier's prediction — but his orbit was wrong, and astronomers had seen the planet before without knowing.

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