Charles Renard in the context of "Dirigible"

Pierre Jules César Janssen (22 February 1824 – 23 December 1907), 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.

The La France was a French Army non-rigid airship launched by Charles Renard and Arthur Constantin Krebs on August 9, 1884. Collaborating with Charles Renard, Arthur Constantin Krebs piloted the first fully controlled free-flight with the La France. The 170-foot (52 m) long, 66,000-cubic-foot (1,900 m) airship, electric-powered with a 435 kg (959 lb) zinc-chlorine flow battery completed a flight that covered 8 km (5.0 mi) in 23 minutes. It was the first full round trip flight with a landing on the starting point. On its seven flights in 1884 and 1885 the La France dirigible returned five times to its starting point.