P.J.C. Janssen was born in 1824 in France. Pierre Jules César Janssen, also known as Jules Janssen, was a French astronomer who, along with the English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the... (Full Biography Below)
We found 1 films starring P.J.C. Janssen.
P.J.C. Janssen was born in 1824 in France. Pierre Jules César Janssen, also known as Jules Janssen, was a French astronomer who, along with the English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium.
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