Teams of the Lyon Astrophysics Research Center have finalized the reintegration in Germany of two spectrographs of the 4MOST instrument, intended to equip the VISTA telescope of the European Southern Observatory in Chile.
On June 2019, Professor Gilles Chabrier was awarded for his seminal contributions to a variety of astrophysical domains, from planetary to stellar and galactic astronomy.
Through a quirk of nature called “gravitational lensing,” a natural lens in space amplified a very distant star’s light. Astronomers using Hubble took advantage of this phenomenon to pinpoint the faraway star and set a new distance record for the farthest individual star ever seen. They also used the distant star to test one theory of dark matter, and to probe the make-up of a galaxy cluster. The team dubbed the star “Icarus,” after the Greek mythological character who flew too near the Sun on wings of feathers and wax that melted. Its official name is MACS J1149+2223 Lensed Star 1.