How FLEX measures Earth’s secret glow from space

Launch of FLEX and Sentinel-3C on Vega-C 🚀 Two missions just launched on one rocket, both headed up to help us look after our planet. Our FLEX mission and the Copernicus Sentinel-3C satellite lifted off together aboard a Vega-C rocket from Europe's Spaceport in French Guiana on 15 September 2026 at 03:21 CEST. FLEX will watch plants glow as they photosynthesise. That faint light tells us how healthy a plant is, and when it's under stress, long before we'd spot any change by eye. Sentinel-3C joi