This paper made history by demonstrating entanglement using a satellite for the first time. Instead the team relied on it solely for simultaneously transmitting a pair of secret keys to allow two ground stations in China, located more than 1, kilometers apart, to establish a direct link. In addition to showing integration in a full network, the satellite links achieved higher key rates than previously shown, up to The satellite serves as the source of pairs of entangled photons, twinned light particles whose properties remain intertwined no matter how far apart they are. The satellites will be launched in through Virgin Galactic. Higher efficiency links and increased entangled-photon generation rates will be required for a viable satellite-to-double-ground-station system. Get smart. Continue Learn more.