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The Impact of Planetary Phase Functions On Exo-Earth Detectability With EXOSIMS - Astrobiology WebAstrobiology Web · Thu, 06 Aug 2026 16:39:01 GMTEarth had life for roughly three billion years before it produced enough oxygen to be detectable from space, which means NASA's new planet-hunting telescope could be staring directly at an inhabited world and see nothing - spacedaily.comspacedaily.com · Sun, 26 Jul 2026 07:00:00 GMT