Pierre Janssen, Date of Birth, Place of Birth, Date of Death

Pierre Janssen

French astronomer

Date of Birth: 22-Feb-1824

Place of Birth: Paris, Île-de-France, France

Date of Death: 23-Dec-1907

Profession: astronomer

Nationality: France

Zodiac Sign: Pisces

Pierre Jules César 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.