Researchers have detected helium in the atmosphere of the exoplanet WASP 107b, which is the first time the element has been discovered in an exoplanet atmosphere. | HubbleESA

Astronomers Discover ‘Cosmic Treasure’ Around Exoplanet WASP-107b

Helium is abundant throughout the universe, but detection of the element in exoplanet atmospheres has eluded astronomers — until now.