202K views · 2.6K shares | Exoplanet discovery!  Our NASA Exoplanets mission NASA's Transiting Exoplanet Survey Satellite - TESS has discovered its first Earth-sized planet in its star’s habitable zone — the Goldilocks zone for potential liquid water on the surface! Scientists have confirmed with NASA's Spitzer Space Telescope: https://go.nasa.gov/2T1PX0q | NASA - National Aeronautics and Space Administration | Facebook