China launches the world’s first quantum satellite, which will help it establish “hack-proof” communications between space and the ground. The satellite is named after the ancient Chinese scientist and philosopher Micius. The satellite will create pairs of so-called entangled photons – tiny sub-atomic particles of light whose properties are dependent on each other – beaming one half of each pair down to base stations in China and Austria. Because its quantum state cannot be observed without changing it. it is useful for ensuring secure communication.
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