Space Exploration

Pierre Janssen Discovers Helium in Solar Spectrum

French astronomer Pierre Janssen, while observing the solar spectrum during a total solar eclipse in Guntur, India, discovered a new element. Upon analyzing the light emitted by the sun, he identified a spectral line that did not correspond to any known element at the time, which was later confirmed to be helium. This unexpected discovery was significant, expanding our understanding of elemental composition in celestial bodies.

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