Quote:
Originally Posted by korjik
Orbital mechanics mostly. You can get total mass and mass fraction of each component that way. That leaves you with two compact massive nonluminous objects. If they are also pulsars, you know they are spinning too fast to be anything else either.
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How do we know how the orbital mechanics of the situation work? Why would keppler's law necessarily apply in contexts it was not created in?
How do we know that the pulse from a pulsar means an object is spinning?