ix shapes rest in the center of a big flat disc. One recalls the amorphous pieces of silicon produced by the impact of lightning strike on sand, while the others may resemble to jellyfishes, corals or seaweeds living in the depths of unknown seas. Each one is filled of a matter-energy which shades and structure are unique. These six shapes are all different but they no doubt belong to the same class of objects, the same category of things. To physicists they recall the tubes used by Heinrich Geissler to experiment on the behavior of certain gases when electrical current flows through them. To those who visit shops in science museums they remind the luminous globes that react to touch. To explorers of the northern latitudes, they recall the aurora borealis. They are at once all of these and at the same time neither of them. They are filled with noble gases that compose the interstellar environment: argon, neon, krypton, xenon, nitrogen. They are made of the same matter of the sun: plasma. Plasma is the fourth state of matter, it composes 99 % of our visible universe but none of the 100 % of the one we evolve in. What is strange is to hear its activity as if it came from inside our bodies, when we place our elbows on the ring that surrounds the disc. The entire installation pulses to the rhythm of the sun’s electromagnetic activity.