Pierre Janssen

Pierre Jules César Janssen, usually 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.

22 February 1824

Born on the same birth day (22 February): Akira Takasaki • Devon Malcolm • Dick Van Arsdale • Dixon Machado • James Hong • Karol Świerczewski • Kenneth Williams • Kia Nurse • Philippe Gaumont • Rajon Rondo • Sheldon Leonard • Tom Okker

Born in the same month (February 1824): Dayananda Saraswati • Peter Kosler • Ranald MacDonald • Samuel Plimsoll • Winfield Scott Hancock