"NASA's Hubble Telescope Discovers Water World in Exoplanet's Atmosphere"

Astronomers using the Hubble Space Telescope have detected water vapor in the atmosphere of GJ 9827d, a small exoplanet, indicating the presence of water-rich atmospheres on similar planets. This discovery is a significant step in understanding the composition and evolution of exoplanetary atmospheres, and it could provide insights into the prevalence and diversity of atmospheres on rocky planets. The planet, about twice the size of Earth, is as hot as Venus, making it a steamy world, and its atmosphere may be a mix of water and hydrogen or a warmer version of Jupiter's moon Europa. This finding opens the door to future studies of similar planets by the James Webb Space Telescope.