What happened in the 1860s?
🔬 The discovery of helium by Pierre Janssen during a solar eclipse (1868)
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Further Reading
August 18 and October 20, 1868: Discovery of Helium (aps.org)
The High-Flying, Death-Defying Discovery of Helium (sciencehistory.org)
How Scientists Discovered Helium, the First Alien Element, 150 ... (smithsonianmag.com)
Pierre Janssen | Discoverer of Helium, Solar Spectroscopy - Britannica (britannica.com)
Aug. 18, 1868: Helium Discovered During Total Solar Eclipse - WIRED (wired.com)
This May, we're diving into the fascinating discovery of Helium! Back ... (facebook.com)
Springer The Story of Helium and the Birth of Astrophysics (optics-pro.com)
Helium - Element information, properties and uses | Periodic Table (rsc.org)
Helium first discovered during 1868 eclipse; the element later ... (purdue.edu)