ESA's Herschel Space Observatory, launched on 14 May 2009, ran out of liquid helium on Monday 29 April, causing global warming and the end of operations. It has allowed a leap forward in understanding the birth of stars, the evolution of galaxies and interstellar matter, and even our solar system. Initially scheduled to run for three and a half years, Herschel will have opened a new window on the Universe and provided more than 25,000 hours of data for 600 observation programs.
Click here to read the press release in French on the CEA website