100% verified The same day, three eras.

10 August

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Contemporary era

1990

Magellan reaches Venus

On 10 August 1990, the Magellan probe entered orbit around Venus to map it.

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Contemporary era

1846

Founding of the Smithsonian Institution

On 10 August 1846, the Smithsonian Institution was founded in Washington.

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From the Middle Ages to the Enlightenment

1675

Founding of the Greenwich Observatory

On 10 August 1675, the foundation stone of the Royal Greenwich Observatory was laid.

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