Argon - The First Noble Gas Molecules Discovered In Space

There are only six of them: radon, helium, neon, krypton, xenon and the first molecules to be discovered in space - argon. They are all odorless, colorless, monatomic gases with very low chemical reactivity. So where did a team of astronomers using ESA's Herschel Space Observatory make their rather unusual discovery? Try Messier 1... The […]