Astronomer Pierre Janssen discovered this element while studying a solar eclipse
Pierre Janssen - Wikipedia  Pierre Jules Csar Janssen (22 February 1824  23 December 1907), also known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium.
jeopardy/2661_Qs.txt at master  jedoublen/jeopardy  GitHub  In the 1700s Jacques Daviel performed the first modern surgery on this clouding of the eye's lens | cataract. right: Jonathan. Wrong: Value: $200. Number: 26.