DefenceTalkThink of it as a celestial parlor game: What is the minimum number of satellites needed to see every point on Earth? And how might those satellites stay in orbit and maintain continuous 24/7 coverage while contending with Earth’s gravity field, its lumpy mass, the pull of the sun and moon, and pressure from solar […]https://www.defencetalk.com/satellite-constellations-harvest-energy-for-near-total-global-coverage-73075/