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The photonic sphere – A fragment of a sphere formed by circular orbits of light around a Schwarzschild black hole.
The photonic sphere
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The photonic sphere – A fragment of a sphere formed by circular orbits of light around a Schwarzschild black hole.
Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.