Helium is discovered during a solar eclipse - August 18th, 1868

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On this day in 1868, French astronomer Pierre Janssen discovered an unknown element while observing a solar eclipse.See omnystudio.com/listener for privacy information.

Episode metadata supplied by the publisher feed · Published Aug 18, 2023

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On this day in 1868, French astronomer Pierre Janssen discovered an unknown element while observing a solar eclipse.

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Helium is discovered during a solar eclipse - August 18th, 1868

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