🚨 For the first time, NASA's Hubble Space Telescope has found water vapor in the atmosphere of a habitable-zone super-Earth size exoplanet. 💦 Its size and surface gravity are much larger than Earth’s, and its radiation environment may be hostile, but a distant planet called K2-18b has captured the interest of scientists all over the world. For the first time, researchers have detected water vapor signatures in the atmosphere of a planet beyond our solar system that resides in the "habitable zo

278K views · 13K reactions | The Hubble Space Telescope is one of the...

4.3K views · 360 reactions | Twenty years ago, astronauts went to upgrade the Hubble Space Telescope in space for the third time. Take a look back at our archived footage from this mission to relive these iconic and historic moments for yourself: https://go.nasa.gov/34K3bkN | NASA's Hubble Space Telescope | Facebook