"Hubble Telescope Discovers Water Vapor in Atmosphere of Small Exoplanet"
NASA's Hubble Space Telescope has detected water in the atmosphere of exoplanet GJ 9827D, the smallest planet of its kind to reveal such a discovery. The finding, made possible through atmospheric detection, represents a landmark discovery and brings astronomers closer to characterizing Earth-like worlds. The discovery, detailed in a new study, suggests the possibility of a "water world" or a hydrogen-rich atmosphere with water vapor. The observation of water is seen as a gateway to additional discoveries, with potential for further insights from NASA's James Webb Space Telescope.