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Time-like infinity of the past – a given region of space-time in the distant past from which all the world lines of matter particles came.
Time-like infinity of the past – a given region of space-time in the distant past from which all the world lines of matter particles came.
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.