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Time-like world line – a world line or “trajectory” in space-time that has an angle of less than 45o with the time axis is a world line.
Time-like world line
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Time-like world line – a world line or “trajectory” in space-time that has an angle of less than 45o with the time axis is a world line.
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.