Celestial Mechanics

Imagine Continuum 71 BC, beginning one day after the new moon, when Mars and Venus rise together in the Southeast. Using only two numbers for each planet, everyone knows the exact day to arrive. Now, Using NASA 2-line elements, 6 numbers for each GPS satellite, everyone knows exactly what millisecond it is. How?

Event Timeslots (1)

DELA IV
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Imagine Continuum 71 BC, beginning one day after the new moon, when Mars and Venus rise together in the Southeast. Using only two numbers for each planet, everyone knows the exact day to arrive. Now, Using NASA 2-line elements, 6 numbers for each GPS satellite, everyone knows exactly what millisecond it is. How?