NASA Photo Caption Above:  SpaceX second stage separates from NASA’s Sentinel-6B on Monday, Nov. 17, 2025. A collaboration between NASA, ESA (European Space Agency), EUMETSAT (European Organisation for the Exploitation of Meteorological Satellites), and the National Oceanic and Atmospheric Administration (NOAA), Sentinel-6B is designed to measure sea levels down to roughly an inch for about...Read More