Reply to post: Re: What about the vacuum part?

Three certainties in life: Death, taxes and the speed of light – wait no, maybe not that last one

Pompous Git Silver badge

Re: What about the vacuum part?

Is the speed of light in intergalactic, or intergalactic-family space faster than in interstellar or interplanetary space where the local density of space is likely to be different?
I suspect that you'll have to await actual in situ measurement if you are an Aristotelian. If you're a neo-Platonist, it's just a matter of contemplating your navel and then plucking a number out of your arse ;-)

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