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With gravitational redshift, the frequency of electromagnetic waves changes as they move away from massive objects. It can be used to find out their intrinsic velocity.
With gravitational redshift, the frequency of electromagnetic waves changes as they move away from massive objects. It can be used to find out their intrinsic velocity.
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.